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EnvStats (version 2.0.1)

Package for Environmental Statistics, Including US EPA Guidance

Description

Graphical and statistical analyses of environmental data, with focus on analyzing chemical concentrations and physical parameters, usually in the context of mandated environmental monitoring. Major environmental statistical methods found in the literature and regulatory guidance documents, with extensive help that explains what these methods do, how to use them, and where to find them in the literature. Numerous built-in data sets from regulatory guidance documents and environmental statistics literature. Includes scripts reproducing analyses presented in the book "EnvStats: An R Package for Environmental Statistics" (Millard, 2013, Springer).

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Install

install.packages('EnvStats')

Monthly Downloads

14,320

Version

2.0.1

License

GPL (>= 3)

Maintainer

Steven Millard

Last Published

May 25th, 2015

Functions in EnvStats (2.0.1)

EPA.09.Ex.14.1.manganese.df

Manganese Concentrations from Example 14-1 of 2009 USEPA Guidance Document
EPA.02d.Ex.6.mg.per.kg.vec

Concentrations in Exhibit 6 of 2002d USEPA Guidance Document
FcnsByCatDataTrans

EnvStats Functions for Data Transformations
FcnsByCatPlotProbDists

EnvStats Functions for Plotting Probability Distributions
EPA.09.Ex.16.4.copper.df

Copper Concentrations from Example 16-4 of 2009 USEPA Guidance Document
Helsel.Cohn.88.silver.df

Silver Concentrations From An Interlab Comparison
anovaPE

Compute Lack-of-Fit and Pure Error Anova Table for a Linear Model
EPA.09.Ex.16.1.sulfate.df

Sulfate Concentrations from Example 16-1 of 2009 USEPA Guidance Document
eqgevd

Estimate Quantiles of a Generalized Extreme Value Distribution
elnormAlt

Estimate Parameters of a Lognormal Distribution (Original Scale)
EPA.09.Ex.15.1.manganese.df

Manganese Concentrations from Example 15-1 of 2009 USEPA Guidance Document
EPA.09.Ex.11.1.arsenic.df

Arsenic Concentrations from Example 11-1 of 2009 USEPA Guidance Document
EPA.92d.chromium.df

Chromium Concentrations from 1992 USEPA Guidance Document
EPA.09.Ex.18.2.chrysene.df

Chrysene Concentrations from Example 18-2 of 2009 USEPA Guidance Document
EPA.02d.Ex.9.mg.per.L.vec

Concentrations in Exhibit 9 of 2002d USEPA Guidance Document
EPA.09.Ex.21.6.nitrate.df

Nitrate Concentrations from Example 21-6 of 2009 USEPA Guidance Document
EPA.09.Ex.17.3.log.chrysene.df

Log-transformed Chrysene Concentrations from Example 17-3 of 2009 USEPA Guidance Document
EPA.09.Ex.18.4.xylene.df

Xylene Concentrations from Example 18-4 of 2009 USEPA Guidance Document
EPA.09.Ex.22.1.VC.df

Vinyl Chloride Concentrations from Example 22-1 of 2009 USEPA Guidance Document
EPA.09.Ex.12.1.ccl4.df

Carbon Tetrachloride Concentrations from Example 12-1 of 2009 USEPA Guidance Document
aovPower

Compute the Power of a One-Way Fixed-Effects Analysis of Variance
EPA.09.Ex.21.5.beryllium.df

Beryllium Concentrations from Example 21-5 of 2009 USEPA Guidance Document
Benthic.df

Benthic Data from Monitoring Program in Chesapeake Bay
calibrate

Fit a Calibration Line or Curve
EPA.89b.aldicarb2.df

Aldicarb Concentrations from 1989 USEPA Guidance Document
ciNormHalfWidth

Half-Width of Confidence Interval for Normal Distribution Mean or Difference Between Two Means
EPA.92c.lognickel1.df

Log-transformed Nickel Concentrations from 1992 USEPA Guidance Document
eqzmlnorm

Estimate Quantiles of a Zero-Modified Lognormal (Delta) Distribution
EPA.09.Ex.14.3.alkalinity.df

Alkalinity Measures from Example 14-3 of 2009 USEPA Guidance Document
EPA.89b.chlordane2.df

Chlordane Concentrations from 1989 USEPA Guidance Document
EPA.89b.aldicarb1.df

Aldicarb Concentrations from 1989 USEPA Guidance Document
EPA.09.Ex.17.1.loglead.df

Log-transformed Lead Concentrations from Example 17-1 of 2009 USEPA Guidance Document
EPA.89b.toc.vec

Total Organic Carbon Concentrations from 1989 USEPA Guidance Document
EPA.09.Ex.21.1.aldicarb.df

Aldicarb Concentrations from Example 21-1 of 2009 USEPA Guidance Document
longToWide

Convert a Long Format Data Set into a Wide Format
gpqCiNormCensored

Generalized Pivotal Quantity for Confidence Interval for the Mean of a Normal Distribution Based on Censored Data
EPA.92c.toluene.df

Toluene Concentrations from 1992 USEPA Guidance Document
Empirical

The Empirical Distribution Based on a Set of Observations
EPA.97.cadmium.111.df

Calibration Data for Cadmium at Mass 111
FcnsByCatPrintPlot

EnvStats Functions for Printing and Plotting Objects of Various S3 Classes
EPA.92c.copper1.df

Copper Concentrations from 1992 USEPA Guidance Document
LognormalMixAlt

Mixture of Two Lognormal Distributions (Alternative Parameterization)
cv

Sample Coefficient of Variation.
EPA.92c.arsenic2.df

Arsenic Concentrations from 1992 USEPA Guidance Document
plotAovDesign

Create Plots for a Sampling Design Based on a One-Way Fixed-Effects Analysis of Variance
print.boxcoxLm

Print Output of Objective for Box-Cox Power Transformations for an "lm" Object
FcnsByCatMCandRisk

EnvStats Functions for Monte Carlo Simulation and Risk Assessment
enbinom

Estimate Probability Parameter of a Negative Binomial Distribution
eexp

Estimate Rate Parameter of an Exponential Distribution
Distribution.df

Data Frame Summarizing Available Probability Distributions and Estimation Methods
FcnsByCatProbDists

EnvStats Probability Distributions and Random Numbers
EPA.94b.lead.df

Lead Concentrations from 1994 USEPA Guidance Document
enorm

Estimate Parameters of a Normal (Gaussian) Distribution
eqbinom

Estimate Quantiles of a Binomial Distribution
LognormalMix

Mixture of Two Lognormal Distributions
EVD

The Extreme Value (Gumbel) Distribution
eqnbinom

Estimate Quantiles of a Negative Binomial Distribution
gofCensored.object

S3 Class "gofCensored"
qqPlotGestalt

Develop Gestalt of Q-Q Plots for Specific Distributions
FcnsByCatPredInts

EnvStats Functions for Prediction Intervals
HoskingEtAl1985

Abstract: Hosking et al. (1985)
EulersConstant

Euler's Constant
egammaAltCensored

Estimate Mean and Coefficient of Variation for a Gamma Distribution Based on Type I Censored Data
linearTrendTestPower

Power of a t-Test for Linear Trend
ciBinomHalfWidth

Half-Width of Confidence Interval for Binomial Proportion or Difference Between Two Proportions
predIntNorm

Prediction Interval for a Normal Distribution
EPA.09.Ex.21.7.TCE.df

Trichloroethylene Concentrations from Example 21-7 of 2009 USEPA Guidance Document
ecdfPlotCensored

Empirical Cumulative Distribution Function Plot Based on Type I Censored Data
NIOSH.89.air.lead.vec

NIOSH Air Lead Levels Data
ciNparConfLevel

Compute Confidence Level Associated with a Nonparametric Confidence Interval for a Quantile
EPA.09.Ex.16.5.PCE.df

Tetrachloroethylene Concentrations from Example 16-5 of 2009 USEPA Guidance Document
boxcoxCensored

Boxcox Power Transformation for Type I Censored Data
EPA.09.Ex.19.2.chloride.df

Chloride Concentrations from Example 19-2 of 2009 USEPA Guidance Document
EPA.09.Ex.16.2.benzene.df

Benzene Concentrations from Example 16-2 of 2009 USEPA Guidance Document
EPA.89b.lead.df

Lead Concentrations from 1989 USEPA Guidance Document
skewness

Coefficient of Skewness
ezmnorm

Estimate Parameters of a Zero-Modified Normal Distribution
gpqTolIntNormCensored

Generalized Pivotal Quantity for Tolerance Interval for a Normal Distribution Based on Censored Data
EPA.92c.chrysene.df

Chrysene Concentrations from 1992 USEPA Guidance Document
ecdfPlot

Empirical Cumulative Distribution Function Plot
qqPlotCensored

Quantile-Quantile (Q-Q) Plot for Type I Censored Data
EPA.09.Ex.7.1.arsenic.df

Arsenic concentrations from Example 7.1 of 2009 USEPA Guidance Document
ppointsCensored

Plotting Positions for Type I Censored Data
base

Base $b$ Representation of a Number
epareto

Estimate Parameters of a Pareto Distribution
gofOutlier.object

S3 Class "gofOutlier"
oneSamplePermutationTest

Fisher's One-Sample Randomization (Permutation) Test for Location
inversePredictCalibrate

Predict Concentration Using Calibration
pointwise

Pointwise Confidence Limits for Predictions
predIntNparSimultaneousConfLevel

Confidence Level of Simultaneous Nonparametric Prediction Interval for Continuous Distribution
print.gof

Print Output of Goodness-of-Fit Tests
Graham.et.al.75.etu.df

Ethylene Thiourea Dose-Response Data
EPA.92c.benzene1.df

Benzene Concentrations from 1992 USEPA Guidance Document
eqlogis

Estimate Quantiles of a Logistic Distribution
predIntNormSimultaneousTestPower

Probability That at Least One Set of Future Observations Violates the Given Rule Based on a Simultaneous Prediction Interval for a Normal Distribution
EPA.92c.benzene2.df

Benzene Concentrations from 1992 USEPA Guidance Document
rosnerTest

Rosner's Test for Outliers
egamma

Estimate Parameters of Gamma Distribution
gofTwoSample.object

S3 Class "gofTwoSample"
tTestLnormAltRatioOfMeans

Minimal or Maximal Detectable Ratio of Means for One- or Two-Sample t-Test, Assuming Lognormal Data
plotTTestDesign

Plots for a Sampling Design Based on a One- or Two-Sample t-Test
predIntNormN

Sample Size for a Specified Half-Width of a Prediction Interval for the next $k$ Observations from a Normal Distribution
htestCensored.object

S3 Class "htestCensored"
egevd

Estimate Parameters of a Generalized Extreme Value Distribution
plot.boxcox

Plot Results of Box-Cox Transformations
Environmental

Atmospheric Environmental Conditions in New York City
print.summaryStats

Print Summary Statistics
Ozone.NE.df

Ozone Concentrations in the Northeast U.S.
tolIntLnormCensored

Tolerance Interval for a Lognormal Distribution Based on Censored Data
EPA.09.Ex.13.1.iron.df

Iron Concentrations from Example 13-1 of 2009 USEPA Guidance Document
predIntNparSimultaneousN

Sample Size for Simultaneous Nonparametric Prediction Interval for Continuous Distribution
evNormOrdStats

Expected Value of Order Statistics from Random Sample from Standard Normal Distribution
predIntGammaSimultaneous

Simultaneous Prediction Interval for a Gamma Distribution
plotLinearTrendTestDesign

Plots for a Sampling Design Based on a t-Test for Linear Trend
print.permutationTest

Print Output of Permutation Tests
EPA.09.Ex.14.4.arsenic.df

Arsenic Concentrations from Example 14-4 of 2009 USEPA Guidance Document
plot.boxcoxLm

Plot Results of Box-Cox Transformations for a Linear Model
eqgamma

Estimate Quantiles of a Gamma Distribution
FcnsByCatEstDistParams

EnvStats Functions for Estimating Distribution Parameters
eqnpar

Estimate Quantiles of a Distribution Nonparametrically
gofGroup.object

S3 Class "gofGroup"
linearTrendTestN

Sample Size for a t-Test for Linear Trend
plot.gof

Plot Results of Goodness-of-Fit Test
egammaCensored

Estimate Shape and Scale Parameters for a Gamma Distribution Based on Type I Censored Data
eqweibull

Estimate Quantiles of a Weibull Distribution
geoSD

Geometric Standard Deviation.
print.estimateCensored

Print Objects of Class "estimateCensored"
Helsel.Cohn.88.app.b.df

Example of Multiply Left-censored Data from Literature
predIntPois

Prediction Interval for a Poisson Distribution
plot.permutationTest

Plot Results of Permutation Test
predIntNparSimultaneousTestPower

Probability That at Least One Set of Future Observations Violates the Given Rule Based on a Nonparametric Simultaneous Prediction Interval
predIntLnormSimultaneous

Simultaneous Prediction Interval for a Lognormal Distribution
predIntLnorm

Prediction Interval for a Lognormal Distribution
plotTTestLnormAltDesign

Plots for a Sampling Design Based on a One- or Two-Sample t-Test, Assuming Lognormal Data
EPA.09.Ex.17.6.sulfate.df

Sulfate Concentrations from Example 17-6 of 2009 USEPA Guidance Document
tolIntNparN

Sample Size for Nonparametric Tolerance Interval for Continuous Distribution
permutationTest.object

S3 Class "permutationTest"
propTestN

Compute Sample Size Necessary to Achieve a Specified Power for a One- or Two-Sample Proportion Test
print.htestCensored

Print Output of Hypothesis Tests Based on Censored Data
EPA.09.Ex.17.5.chloride.df

Chloride Concentrations from Example 17-5 of 2009 USEPA Guidance Document
predIntNormTestPower

Probability That at Least One Future Observation Falls Outside a Prediction Interval for a Normal Distribution
pwMoment

Estimate Probability-Weighted Moments
EnvStats-internal

Internal EnvStats objects
tTestAlpha

Type I Error Level for a One- or Two-Sample t-Test
LognormalTruncAlt

The Truncated Lognormal Distribution (Alternative Parameterization)
tolIntNorm

Tolerance Interval for a Normal Distribution
CastilloAndHadi1994

Abstract: Castillo and Hadi (1994)
boxcoxCensored.object

S3 Class "boxcoxCensored"
tolIntNpar

Nonparametric Tolerance Interval for a Continuous Distribution
EPA.09.Ex.19.5.mercury.df

Mercury Concentrations from Example 19-5 of 2009 USEPA Guidance Document
EPA.02d.Ex.2.ug.per.L.vec

Concentrations in Exhibit 2 of 2002d USEPA Guidance Document
tolIntLnorm

Tolerance Interval for a Lognormal Distribution
EPA.09.Ex.12.4.naphthalene.df

Naphthalene Concentrations from Example 12-4 of 2009 USEPA Guidance Document
EPA.92c.nickel2.df

Nickel Concentrations from 1992 USEPA Guidance Document
ehyper

Estimate Parameter of a Hypergeometric Distribution
FcnsByCatEstDistQuants

EnvStats Functions for Estimating Distribution Quantiles
FcnsByCatSumStats

EnvStats Functions for Summary Statistics and Plots
EPA.09.Ex.6.3.sulfate.df

Sulfate Concentrations from Example 6-3 of 2009 USEPA Guidance Document
epois

Estimate Parameter of a Poisson Distribution
ZeroModifiedNormal

The Zero-Modified Normal Distribution
FcnsByCatTolInts

EnvStats Functions for Tolerance Intervals
eevd

Estimate Parameters of an Extreme Value (Gumbel) Distribution
eqpois

Estimate Quantiles of a Poisson Distribution
EPA.89b.t29.df

T-29 Concentrations from 1989 USEPA Guidance Document
EPA.09.Table.9.4.nickel.vec

Nickel Concentrations in Table 9-4 of 2009 USEPA Guidance Document
Pareto

The Pareto Distribution
kendallTrendTest

Kendall's Nonparametric Test for Montonic Trend
eqbeta

Estimate Quantiles of a Beta Distribution
Olympic.NH4.df

Ammonium Concentration in Precipitation Measured at Olympic National Park Hoh Ranger Station
plotPredIntLnormAltTestPowerCurve

Power Curves for Sampling Design for Test Based on Prediction Interval for Lognormal Distribution
eqnorm

Estimate Quantiles of a Normal Distribution
Lin.Evans.80.df

Fecal Coliform Data from the Illinois River
eqzmnorm

Estimate Quantiles of a Zero-Modified Normal Distribution
Lognormal3

The Three-Parameter Lognormal Distribution
estimateCensored.object

S3 Class "estimateCensored"
predict

Model Predictions
cdfCompare

Plot Two Cumulative Distribution Functions
plotPropTestDesign

Plots for Sampling Design Based on One- or Two-Sample Proportion Test
Chi

The Chi Distribution
errorBar

Plot Pointwise Error Bars
predIntNparConfLevel

Confidence Level for Nonparametric Prediction Interval for Continuous Distribution
kurtosis

Coefficient of (Excess) Kurtosis
gofGroupTest

Goodness-of-Fit Test for a Specified Probability Distribution for Groups
predIntNpar

Nonparametric Prediction Interval for a Continuous Distribution
qqPlot

Quantile-Quantile (Q-Q) Plot
plot.gofTwoSample

Plot Results of Goodness-of-Fit Test to Compare Two Samples
print.estimate

Print Objects of Class "estimate"
plotTolIntNparDesign

Plots for a Sampling Design Based on a Nonparametric Tolerance Interval
EPA.02d.Ex.4.mg.per.kg.vec

Concentrations in Exhibit 4 of 2002d USEPA Guidance Document
EPA.09.Ex.17.4.copper.df

Copper Concentrations from Example 17-4 of 2009 USEPA Guidance Document
print.htest

Print Output of Hypothesis Tests
EPA.09.Ex.20.1.nickel.df

Nickel Concentrations from Example 20-1 of 2009 USEPA Guidance Document
tolIntNparCoverage

Coverage for Nonparametric Tolerance Interval for Continuous Distribution
EPA.89b.benzene.df

Benzene Concentrations from 1989 USEPA Guidance Document
predIntLnormAltSimultaneousTestPower

Probability That at Least One Set of Future Observations Violates the Given Rule Based on a Simultaneous Prediction Interval for a Lognormal Distribution
cdfCompareCensored

Plot Two Cumulative Distribution Functions Based on Censored Data
predict.lm

Predict Method for Linear Model Fits
enparCensored

Estimate Mean, Standard Deviation, and Standard Error Nonparametrically Based on Censored Data
eweibull

Estimate Parameters of a Weibull Distribution
EPA.09.Ex.14.8.df

Analyte Concentrations from Example 14-8 of 2009 USEPA Guidance Document
tolIntNormHalfWidth

Half-Width of a Tolerance Interval for a Normal Distribution
summaryStats

Summary Statistics
tolIntGamma

Tolerance Interval for a Gamma Distribution
EPA.09.Ex.17.2.toluene.df

Toluene Concentrations from Example 17-2 of 2009 USEPA Guidance Document
twoSamplePermutationTestLocation

Two-Sample or Paired-Sample Randomization (Permutation) Test for Location
tTestScaledMdd

Scaled Minimal Detectable Difference for One- or Two-Sample t-Test
calibrate.object

S3 Class "calibrate"
varGroupTest

Test for Homogeneity of Variance Among Two or More Groups
tolIntNormK

Compute the Value of $K$ for a Tolerance Interval for a Normal Distribution
EPA.09.Ex.17.7.sodium.df

Sodium Concentrations from Example 17-7 of 2009 USEPA Guidance Document
EPA.09.Ex.21.2.benzene.df

Benzene Concentrations from Example 21-2 of 2009 USEPA Guidance Document
eqnormCensored

Estimate Quantiles of a Normal Distribution Based on Type I Censored Data
EPA.89b.cadmium.df

Cadmium Concentrations from 1989 USEPA Guidance Document
pdfPlot

Plot Probability Density Function
EPA.09.Ex.17.3.chrysene.df

Chrysene Concentrations from Example 17-3 of 2009 USEPA Guidance Document
EPA.89b.loglead.df

Log-transformed Lead Concentrations from 1989 USEPA Guidance Document
FcnsByCatTrend

EnvStats Functions for Trend Analysis
plot.gofCensored

Plot Results of Goodness-of-Fit Test Based on Censored Data
Modified.TcCB.df

Modified 1,2,3,4-Tetrachlorobenzene Data with Censored Values
plotPredIntNparDesign

Plots for a Sampling Design Based on a Nonparametric Prediction Interval
NormalMix

Mixture of Two Normal Distributions
predIntLnormAltTestPower

Probability That at Least One Future Observation Falls Outside a Prediction Interval for a Lognormal Distribution
EnvStats-package

Package for Environmental Statistics, Including US EPA Guidance
FcnsByCatCensoredData

EnvStats Functions for Censored Data
GammaAlt

The Gamma Distribution (Alternative Parameterization)
GEVD

The Generalized Extreme Value Distribution
summaryStats.object

S3 Class "summaryStats"
boxcox.object

S3 Class "boxcox"
eqlnorm

Estimate Quantiles of a Lognormal Distribution
LognormalAlt

The Lognormal Distribution (Alternative Parameterization)
tTestPower

Power of a One- or Two-Sample t-Test
elnorm3

Estimate Parameters of a Three-Parameter Lognormal Distribution (Log-Scale)
print.boxcox

Print Output of Objective for Box-Cox Power Transformations
geoMean

Geometric Mean
egeom

Estimate Probability Parameter of a Geometric Distribution
plotPredIntLnormAltSimultaneousTestPowerCurve

Power Curves for Sampling Design for Test Based on Simultaneous Prediction Interval for Lognormal Distribution
boxcox

Boxcox Power Transformation
plotPredIntNormSimultaneousTestPowerCurve

Power Curves for Sampling Design for Test Based on Simultaneous Prediction Interval for Normal Distribution
elnormCensored

Estimate Parameters for a Lognormal Distribution (Log-Scale) Based on Type I Censored Data
eqlnormCensored

Estimate Quantiles of a Lognormal Distribution Based on Type I Censored Data
equnif

Estimate Quantiles of a Uniform Distribution
enormCensored

Estimate Parameters for a Normal Distribution Based on Type I Censored Data
print.gofTwoSample

Print Output of Two-Sample Goodness-of-Fit Tests
varTest

One-Sample Chi-Squared Test on Variance
twoSampleLinearRankTestCensored

Two-Sample Linear Rank Test to Detect a Difference Between Two Distributions Based on Censored Data
ezmlnorm

Estimate Parameters of a Zero-Modified Lognormal (Delta) Distribution
plotPredIntNparSimultaneousTestPowerCurve

Power Curves for Sampling Design for Test Based on Nonparametric Simultaneous Prediction Interval
kendallSeasonalTrendTest

Nonparametric Test for Monotonic Trend Within Each Season Based on Kendall's Tau Statistic
print.gofGroup

Print Output of Group Goodness-of-Fit Tests
print.gofCensored

Print Output of Goodness-of-Fit Tests Based on Censored Data
signTest

One-Sample or Paired-Sample Sign Test on a Median
serialCorrelationTest

Test for the Presence of Serial Correlation
stripChart

1-D Scatter Plots with Confidence Intervals
tTestN

Sample Size for a One- or Two-Sample t-Test
EPA.92c.arsenic3.df

Arsenic Concentrations from 1992 USEPA Guidance Document
Gibbons.et.al.09.Vinyl.Chloride.vec

Vinyl Chloride Data from Gibbons et al. (2009)
Total.P.df

Total Phosphorus Data from Chesapeake Bay
EPA.09.Ex.18.1.arsenic.df

Arsenic Concentrations from Example 18-1 of 2009 USEPA Guidance Document
cdfPlot

Plot Cumulative Distribution Function
eqhyper

Estimate Quantiles of a Hypergeometric Distribution
eqgeom

Estimate Quantiles of a Geometric Distribution
plot.boxcoxCensored

Plot Results of Box-Cox Transformations Based on Type I Censored Data
predIntNormSimultaneous

Simultaneous Prediction Interval for a Normal Distribution
predIntNparSimultaneous

Nonparametric Simultaneous Prediction Interval for a Continuous Distribution
zTestGevdShape

Test Whether the Shape Parameter of a Generalized Extreme Value Distribution is Equal to 0
EPA.09.Ex.10.1.nickel.df

Nickel Concentrations from Example 10-1 of 2009 USEPA Guidance Document
EPA.92c.arsenic1.df

Arsenic Concentrations from 1992 USEPA Guidance Document
EPA.89b.manganese.df

Manganese Concentrations from 1989 USEPA Guidance Document
EPA.92c.copper2.df

Copper Concentrations from 1992 USEPA Guidance Document
EPA.94b.tccb.df

1,2,3,4-Tetrachlorobenzene Concentrations from 1994 USEPA Guidance Document
ciBinomN

Sample Size for Specified Half-Width of Confidence Interval for Binomial Proportion or Difference Between Two Proportions
chenTTest

Chen's Modified One-Sided t-test for Skewed Distributions
eunif

Estimate Parameters of a Uniform Distribution
detectionLimitCalibrate

Determine Detection Limit
ciTableMean

Table of Confidence Intervals for Mean or Difference Between Two Means
FcnsByCat

EnvStats Functions Listed by Category
FcnsByCatHypothTests

EnvStats Functions for Hypothesis Tests
plotCiBinomDesign

Plots for Sampling Design Based on Confidence Interval for Binomial Proportion or Difference Between Two Proportions
predIntNormSimultaneousK

Compute the Value of $K$ for a Simultaneous Prediction Interval for a Normal Distribution
tTestLnormAltN

Sample Size for a One- or Two-Sample t-Test, Assuming Lognormal Data
htest.object

S3 Class "htest"
EPA.09.Table.9.3.df

Arsenic, Mercury and Strontium Concentrations in Table 9-3 of 2009 USEPA Guidance Document
EPA.09.Ex.18.3.TCE.df

Trichloroethylene Concentrations from Example 18-3 of 2009 USEPA Guidance Document
simulateVector

Simulate a Vector of Random Numbers From a Specified Theoretical or Empirical Probability Distribution
boxcoxLm.object

S3 Class "boxcoxLm"
summaryFull

Full Complement of Summary Statistics
Skagit.NH3_N.df

Ammonia Nitrogen Concentrations in the Skagit River, Marblemount, Washington
ebinom

Estimate Parameter of a Binomial Distribution
tolIntNormCensored

Tolerance Interval for a Normal Distribution Based on Censored Data
FcnsByCatCalibration

EnvStats Functions for Calibration
EPA.09.Ex.22.2.Specific.Conductance.df

Specific Conductance from Example 22-2 of 2009 USEPA Guidance Document
plotPredIntNormDesign

Plots for a Sampling Design Based on a Prediction Interval for the Next $k$ Observations from a Normal Distribution
print.boxcoxCensored

Print Output of Objective for Box-Cox Power Transformations Based on Type I Censored Data
ciTableProp

Table of Confidence Intervals for Proportion or Difference Between Two Proportions
elnormAltCensored

Estimate Parameters for a Lognormal Distribution (Original Scale) Based on Type I Censored Data
estimate.object

S3 Class "estimate"
EPA.09.Table.9.1.TCE.df

Trichloroethene concentrations in Table 9.1 of 2009 USEPA Guidance Document
Millard.Deverel.88.df

Copper and Zinc Concentrations in Shallow Ground Water
plotPredIntNormTestPowerCurve

Power Curves for Sampling Design for Test Based on Prediction Interval for Normal Distribution
Triangular

The Triangular Distribution
print.gofOutlier

Print Output of Goodness-of-Fit Outlier Tests
iqr

Interquartile Range
propTestPower

Compute the Power of a One- or Two-Sample Proportion Test
newsEnvStats

Show the EnvStats NEWS File
ciNormN

Sample Size for Specified Half-Width of Confidence Interval for Normal Distribution Mean or Difference Between Two Means
plotCiNparDesign

Plots for Sampling Design Based on Nonparametric Confidence Interval for a Quantile
eqexp

Estimate Quantiles of an Exponential Distribution
tolIntPois

Tolerance Interval for a Poisson Distribution
lMoment

Estimate $L$-Moments
elnorm

Estimate Parameters of a Lognormal Distribution (Log-Scale)
eqpareto

Estimate Quantiles of a Pareto Distribution
Refinery.CO.df

Carbon Monoxide Emissions from Oil Refinery.
epdfPlot

Plot Empirical Probability Density Function
plotTolIntNormDesign

Plots for a Sampling Design Based on a Tolerance Interval for a Normal Distribution
eqevd

Estimate Quantiles of an Extreme Value (Gumbel) Distribution
linearTrendTestScaledMds

Scaled Minimal Detectable Slope for a t-Test for Linear Trend
predIntNparN

Sample Size for a Nonparametric Prediction Interval for a Continuous Distribution
EPA.89b.sulfate.df

Sulfate Concentrations from 1989 USEPA Guidance Document
LognormalTrunc

The Truncated Lognormal Distribution
predIntNormK

Compute the Value of $K$ for a Prediction Interval for a Normal Distribution
tolIntNparConfLevel

Confidence Level for Nonparametric Tolerance Interval for Continuous Distribution
EPA.92c.ccl4.df

Carbon Tetrachloride Concentrations from 1992 USEPA Guidance Document
twoSampleLinearRankTest

Two-Sample Linear Rank Test to Detect a Difference Between Two Distributions
ebeta

Estimate Parameters of a Beta Distribution
elogis

Estimate Parameters of a Logistic Distribution
gof.object

S3 Class "gof"
gofTest

Goodness-of-Fit Test
gofTestCensored

Goodness-of-Fit Test for Normal or Lognormal Distribution Based on Censored Data
plotPredIntNparSimultaneousDesign

Plots for a Sampling Design Based on a Simultaneous Nonparametric Prediction Interval
plot.gofGroup

Plot Results of Group Goodness-of-Fit Test
plotCiNormDesign

Plots for Sampling Design Based on Confidence Interval for Mean of a Normal Distribution or Difference Between Two Means
EPA.92d.chromium.vec

Chromium Concentrations from 1992 USEPA Guidance Document
EPA.92c.nickel1.df

Nickel Concentrations from 1992 USEPA Guidance Document
FcnsByCatGOFTests

EnvStats Functions for Goodness-of-Fit Tests
twoSamplePermutationTestProportion

Randomization (Permutation) Test to Compare Two Proportions (Fisher's Exact Test)
ZeroModifiedLognormal

The Zero-Modified Lognormal (Delta) Distribution
EPA.89b.edb.df

EDB Concentrations from 1989 USEPA Guidance Document
Gibbons.et.al.09.Alkilinity.vec

Alkilinity Data from Gibbons et al. (2009)
ZeroModifiedLognormalAlt

The Zero-Modified Lognormal (Delta) Distribution (Alternative Parameterization)
boxcoxTransform

Apply a Box-Cox Power Transformation to a Set of Data
predIntNormHalfWidth

Half-Width of a Prediction Interval for the next $k$ Observations from a Normal Distribution
propTestMdd

Minimal Detectable Difference Associated with a One- or Two-Sample Proportion Test
quantileTestPValue

Compute p-Value for the Quantile Test
simulateMvMatrix

Simulate a Multivariate Matrix Based on a Specified Rank Correlation Mat
tTestLnormAltPower

Power of a One- or Two-Sample t-Test Assuming Lognormal Data
eqlnorm3

Estimate Quantiles of a Three-Parameter Lognormal Distribution
EPA.89b.chlordane1.df

Chlordane Concentrations from 1989 USEPA Guidance Document
NormalTrunc

The Truncated Normal Distribution
predIntGamma

Prediction Interval for Gamma Distribution
tolIntNormN

Sample Size for a Specified Half-Width of a Tolerance Interval for a Normal Distribution
epoisCensored

Estimate Mean of a Poisson Distribution Based on Type I Censored Data
print

Print Values
EPA.09.Ex.19.1.sulfate.df

Sulfate Concentrations from Example 19-1 of 2009 USEPA Guidance Document
EPA.92c.zinc.df

Zinc Concentrations from 1992 USEPA Guidance Document
FcnsByCatPower

EnvStats Functions for Power and Sample Size Calculations
aovN

Compute Sample Size Necessary to Achieve Specified Power for One-Way Fixed-Effects Analysis of Variance
ciNparN

Sample Size for Nonparametric Confidence Interval for a Quantile
quantileTest

Two-Sample Rank Test to Detect a Shift in a Proportion of the "Treated" Population