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EnvStats (version 2.0.2)

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

16,927

Version

2.0.2

License

GPL (>= 3)

Maintainer

Steven Millard

Last Published

November 19th, 2015

Functions in EnvStats (2.0.2)

EPA.09.Ex.16.2.benzene.df

Benzene Concentrations from Example 16-2 of 2009 USEPA Guidance Document
Environmental

Atmospheric Environmental Conditions in New York City
NormalMix

Mixture of Two Normal Distributions
EPA.09.Ex.22.2.Specific.Conductance.df

Specific Conductance from Example 22-2 of 2009 USEPA Guidance Document
EPA.02d.Ex.9.mg.per.L.vec

Concentrations in Exhibit 9 of 2002d USEPA Guidance Document
EPA.89b.lead.df

Lead Concentrations from 1989 USEPA Guidance Document
EPA.09.Ex.12.4.naphthalene.df

Naphthalene Concentrations from Example 12-4 of 2009 USEPA Guidance Document
CastilloAndHadi1994

Abstract: Castillo and Hadi (1994)
EPA.89b.chlordane2.df

Chlordane Concentrations from 1989 USEPA Guidance Document
Graham.et.al.75.etu.df

Ethylene Thiourea Dose-Response Data
EPA.92c.benzene2.df

Benzene Concentrations from 1992 USEPA Guidance Document
FcnsByCatGOFTests

EnvStats Functions for Goodness-of-Fit Tests
EPA.09.Ex.13.1.iron.df

Iron Concentrations from Example 13-1 of 2009 USEPA Guidance Document
EPA.09.Ex.10.1.nickel.df

Nickel Concentrations from Example 10-1 of 2009 USEPA Guidance Document
EPA.09.Ex.17.7.sodium.df

Sodium Concentrations from Example 17-7 of 2009 USEPA Guidance Document
anovaPE

Compute Lack-of-Fit and Pure Error Anova Table for a Linear Model
EPA.89b.sulfate.df

Sulfate Concentrations from 1989 USEPA Guidance Document
Refinery.CO.df

Carbon Monoxide Emissions from Oil Refinery.
EPA.09.Ex.12.1.ccl4.df

Carbon Tetrachloride Concentrations from Example 12-1 of 2009 USEPA Guidance Document
boxcox.object

S3 Class "boxcox"
EPA.02d.Ex.6.mg.per.kg.vec

Concentrations in Exhibit 6 of 2002d USEPA Guidance Document
ZeroModifiedLognormal

The Zero-Modified Lognormal (Delta) Distribution
ciNparN

Sample Size for Nonparametric Confidence Interval for a Quantile
EPA.09.Ex.16.1.sulfate.df

Sulfate Concentrations from Example 16-1 of 2009 USEPA Guidance Document
EPA.09.Ex.15.1.manganese.df

Manganese Concentrations from Example 15-1 of 2009 USEPA Guidance Document
EPA.09.Ex.17.1.loglead.df

Log-transformed Lead Concentrations from Example 17-1 of 2009 USEPA Guidance Document
EPA.09.Ex.18.3.TCE.df

Trichloroethylene Concentrations from Example 18-3 of 2009 USEPA Guidance Document
EPA.92c.benzene1.df

Benzene Concentrations from 1992 USEPA Guidance Document
EPA.09.Ex.21.7.TCE.df

Trichloroethylene Concentrations from Example 21-7 of 2009 USEPA Guidance Document
EPA.92c.arsenic2.df

Arsenic Concentrations from 1992 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.19.5.mercury.df

Mercury Concentrations from Example 19-5 of 2009 USEPA Guidance Document
EPA.89b.benzene.df

Benzene Concentrations from 1989 USEPA Guidance Document
Helsel.Cohn.88.app.b.df

Example of Multiply Left-censored Data from Literature
FcnsByCatPredInts

EnvStats Functions for Prediction Intervals
EPA.09.Table.9.1.TCE.df

Trichloroethene concentrations in Table 9.1 of 2009 USEPA Guidance Document
FcnsByCatProbDists

EnvStats Probability Distributions and Random Numbers
EPA.89b.aldicarb2.df

Aldicarb Concentrations from 1989 USEPA Guidance Document
calibrate.object

S3 Class "calibrate"
EPA.09.Ex.17.6.sulfate.df

Sulfate Concentrations from Example 17-6 of 2009 USEPA Guidance Document
EPA.92c.copper1.df

Copper Concentrations from 1992 USEPA Guidance Document
LognormalMixAlt

Mixture of Two Lognormal Distributions (Alternative Parameterization)
Gibbons.et.al.09.Alkilinity.vec

Alkilinity Data from Gibbons et al. (2009)
EPA.09.Ex.19.1.sulfate.df

Sulfate Concentrations from Example 19-1 of 2009 USEPA Guidance Document
EPA.09.Ex.21.5.beryllium.df

Beryllium Concentrations from Example 21-5 of 2009 USEPA Guidance Document
EVD

The Extreme Value (Gumbel) Distribution
EPA.09.Table.9.3.df

Arsenic, Mercury and Strontium Concentrations in Table 9-3 of 2009 USEPA Guidance Document
EPA.09.Ex.21.6.nitrate.df

Nitrate Concentrations from Example 21-6 of 2009 USEPA Guidance Document
EPA.09.Ex.21.1.aldicarb.df

Aldicarb Concentrations from Example 21-1 of 2009 USEPA Guidance Document
EPA.89b.chlordane1.df

Chlordane Concentrations from 1989 USEPA Guidance Document
EPA.92c.nickel2.df

Nickel Concentrations from 1992 USEPA Guidance Document
Millard.Deverel.88.df

Copper and Zinc Concentrations in Shallow Ground Water
FcnsByCatEstDistQuants

EnvStats Functions for Estimating Distribution Quantiles
Triangular

The Triangular Distribution
elnorm

Estimate Parameters of a Lognormal Distribution (Log-Scale)
EPA.94b.tccb.df

1,2,3,4-Tetrachlorobenzene Concentrations from 1994 USEPA Guidance Document
Skagit.NH3_N.df

Ammonia Nitrogen Concentrations in the Skagit River, Marblemount, Washington
estimate.object

S3 Class "estimate"
GammaAlt

The Gamma Distribution (Alternative Parameterization)
enbinom

Estimate Probability Parameter of a Negative Binomial Distribution
Pareto

The Pareto Distribution
gpqTolIntNormCensored

Generalized Pivotal Quantity for Tolerance Interval for a Normal Distribution Based on Censored Data
FcnsByCatDataTrans

EnvStats Functions for Data Transformations
EPA.09.Ex.14.1.manganese.df

Manganese Concentrations from Example 14-1 of 2009 USEPA Guidance Document
Helsel.Cohn.88.silver.df

Silver Concentrations From An Interlab Comparison
egammaCensored

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

Base $b$ Representation of a Number
cdfCompare

Plot Two Cumulative Distribution Functions
FcnsByCatCensoredData

EnvStats Functions for Censored Data
eqhyper

Estimate Quantiles of a Hypergeometric Distribution
Lognormal3

The Three-Parameter Lognormal Distribution
EulersConstant

Euler's Constant
EPA.09.Ex.18.1.arsenic.df

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

Coefficient of (Excess) Kurtosis
eunif

Estimate Parameters of a Uniform Distribution
print.gofTwoSample

Print Output of Two-Sample Goodness-of-Fit Tests
EPA.09.Ex.19.2.chloride.df

Chloride Concentrations from Example 19-2 of 2009 USEPA Guidance Document
Modified.TcCB.df

Modified 1,2,3,4-Tetrachlorobenzene Data with Censored Values
Olympic.NH4.df

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

Estimate Parameters of an Extreme Value (Gumbel) Distribution
EPA.89b.loglead.df

Log-transformed Lead Concentrations from 1989 USEPA Guidance Document
boxcoxTransform

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

Boxcox Power Transformation
eqlnorm

Estimate Quantiles of a Lognormal Distribution
FcnsByCatSumStats

EnvStats Functions for Summary Statistics and Plots
Total.P.df

Total Phosphorus Data from Chesapeake Bay
eqlnorm3

Estimate Quantiles of a Three-Parameter Lognormal Distribution
NIOSH.89.air.lead.vec

NIOSH Air Lead Levels Data
Ozone.NE.df

Ozone Concentrations in the Northeast U.S.
ciTableMean

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

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

Estimate Quantiles of a Zero-Modified Lognormal (Delta) Distribution
linearTrendTestN

Sample Size for a t-Test for Linear Trend
eqnormCensored

Estimate Quantiles of a Normal Distribution Based on Type I Censored Data
eqexp

Estimate Quantiles of an Exponential Distribution
inversePredictCalibrate

Predict Concentration Using Calibration
cdfCompareCensored

Plot Two Cumulative Distribution Functions Based on Censored Data
plot.permutationTest

Plot Results of Permutation Test
plot.gofGroup

Plot Results of Group Goodness-of-Fit Test
chenTTest

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

Geometric Standard Deviation.
ecdfPlot

Empirical Cumulative Distribution Function Plot
plotTolIntNparDesign

Plots for a Sampling Design Based on a Nonparametric Tolerance Interval
gofCensored.object

S3 Class "gofCensored"
gofTest

Goodness-of-Fit Test
permutationTest.object

S3 Class "permutationTest"
plot.gof

Plot Results of Goodness-of-Fit Test
eqlnormCensored

Estimate Quantiles of a Lognormal Distribution Based on Type I Censored Data
EPA.09.Ex.17.3.log.chrysene.df

Log-transformed Chrysene Concentrations from Example 17-3 of 2009 USEPA Guidance Document
gof.object

S3 Class "gof"
iqr

Interquartile Range
eqevd

Estimate Quantiles of an Extreme Value (Gumbel) Distribution
eqzmnorm

Estimate Quantiles of a Zero-Modified Normal Distribution
plotCiNormDesign

Plots for Sampling Design Based on Confidence Interval for Mean of a Normal Distribution or Difference Between Two Means
plot.boxcox

Plot Results of Box-Cox Transformations
tTestLnormAltPower

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

Print Values
lMoment

Estimate $L$-Moments
kendallTrendTest

Kendall's Nonparametric Test for Montonic Trend
plotPredIntNormDesign

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

Plots for a Sampling Design Based on a Simultaneous Nonparametric Prediction Interval
predict

Model Predictions
newsEnvStats

Show the EnvStats NEWS File
eqweibull

Estimate Quantiles of a Weibull Distribution
EPA.89b.manganese.df

Manganese Concentrations from 1989 USEPA Guidance Document
gofTwoSample.object

S3 Class "gofTwoSample"
gofGroup.object

S3 Class "gofGroup"
detectionLimitCalibrate

Determine Detection Limit
rosnerTest

Rosner's Test for Outliers
cdfPlot

Plot Cumulative Distribution Function
evNormOrdStats

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

Power Curves for Sampling Design for Test Based on Simultaneous Prediction Interval for Normal Distribution
plot.gofTwoSample

Plot Results of Goodness-of-Fit Test to Compare Two Samples
predIntNparSimultaneous

Nonparametric Simultaneous Prediction Interval for a Continuous Distribution
htest.object

S3 Class "htest"
tTestLnormAltN

Sample Size for a One- or Two-Sample t-Test, Assuming Lognormal Data
egevd

Estimate Parameters of a Generalized Extreme Value Distribution
summaryFull

Full Complement of Summary Statistics
print.summaryStats

Print Summary Statistics
plotPredIntNormTestPowerCurve

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

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

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

Prediction Interval for a Poisson Distribution
propTestN

Compute Sample Size Necessary to Achieve a Specified Power for a One- or Two-Sample Proportion Test
EPA.02d.Ex.4.mg.per.kg.vec

Concentrations in Exhibit 4 of 2002d USEPA Guidance Document
plot.gofCensored

Plot Results of Goodness-of-Fit Test Based on Censored Data
print.boxcox

Print Output of Objective for Box-Cox Power Transformations
skewness

Coefficient of Skewness
EPA.92c.toluene.df

Toluene Concentrations from 1992 USEPA Guidance Document
quantileTestPValue

Compute p-Value for the Quantile Test
summaryStats.object

S3 Class "summaryStats"
EPA.09.Ex.17.3.chrysene.df

Chrysene Concentrations from Example 17-3 of 2009 USEPA Guidance Document
print.boxcoxCensored

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

Probability That at Least One Future Observation Falls Outside a Prediction Interval for a Normal Distribution
EPA.09.Ex.17.2.toluene.df

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

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

EnvStats Functions for Hypothesis Tests
predIntGamma

Prediction Interval for Gamma Distribution
EPA.09.Ex.17.5.chloride.df

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

Estimate Parameters of a Lognormal Distribution (Original Scale)
predIntNormHalfWidth

Half-Width of a Prediction Interval for the next $k$ Observations from a Normal Distribution
EPA.09.Ex.6.3.sulfate.df

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

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

Minimal or Maximal Detectable Ratio of Means for One- or Two-Sample t-Test, Assuming Lognormal Data
EPA.89b.toc.vec

Total Organic Carbon Concentrations from 1989 USEPA Guidance Document
summaryStats

Summary Statistics
tolIntNpar

Nonparametric Tolerance Interval for a Continuous Distribution
tolIntNorm

Tolerance Interval for a Normal Distribution
print.estimateCensored

Print Objects of Class "estimateCensored"
eqpois

Estimate Quantiles of a Poisson Distribution
NormalTrunc

The Truncated Normal Distribution
print.estimate

Print Objects of Class "estimate"
tolIntGamma

Tolerance Interval for a Gamma Distribution
Benthic.df

Benthic Data from Monitoring Program in Chesapeake Bay
tolIntNparConfLevel

Confidence Level for Nonparametric Tolerance Interval for Continuous Distribution
twoSampleLinearRankTest

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

Estimate Quantiles of a Gamma Distribution
tTestAlpha

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

Quantile-Quantile (Q-Q) Plot for Type I Censored Data
EPA.92d.chromium.df

Chromium Concentrations from 1992 USEPA Guidance Document
ebinom

Estimate Parameter of a Binomial Distribution
EPA.09.Ex.7.1.arsenic.df

Arsenic concentrations from Example 7.1 of 2009 USEPA Guidance Document
FcnsByCat

EnvStats Functions Listed by Category
EPA.92c.arsenic1.df

Arsenic Concentrations from 1992 USEPA Guidance Document
aovPower

Compute the Power of a One-Way Fixed-Effects Analysis of Variance
EPA.92c.chrysene.df

Chrysene Concentrations from 1992 USEPA Guidance Document
EPA.92c.zinc.df

Zinc Concentrations from 1992 USEPA Guidance Document
kendallSeasonalTrendTest

Nonparametric Test for Monotonic Trend Within Each Season Based on Kendall's Tau Statistic
enormCensored

Estimate Parameters for a Normal Distribution Based on Type I Censored Data
estimateCensored.object

S3 Class "estimateCensored"
enparCensored

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

Estimate Quantiles of a Generalized Extreme Value Distribution
eexp

Estimate Rate Parameter of an Exponential Distribution
EPA.09.Ex.11.1.arsenic.df

Arsenic Concentrations from Example 11-1 of 2009 USEPA Guidance Document
plotPredIntNparDesign

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

Generalized Pivotal Quantity for Confidence Interval for the Mean of a Normal Distribution Based on Censored Data
predIntLnormSimultaneous

Simultaneous Prediction Interval for a Lognormal Distribution
egammaAltCensored

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

Estimate Parameters of Gamma Distribution
FcnsByCatPower

EnvStats Functions for Power and Sample Size Calculations
htestCensored.object

S3 Class "htestCensored"
epareto

Estimate Parameters of a Pareto Distribution
plot.boxcoxLm

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

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

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

Sample Size for a Nonparametric Prediction Interval for a Continuous Distribution
elogis

Estimate Parameters of a Logistic Distribution
qqPlot

Quantile-Quantile (Q-Q) Plot
predIntNormK

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

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

Sample Size for Nonparametric Tolerance Interval for Continuous Distribution
print.gofGroup

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

Print Output of Hypothesis Tests Based on Censored Data
plotPredIntLnormAltSimultaneousTestPowerCurve

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

Estimate Quantiles of a Negative Binomial 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
pdfPlot

Plot Probability Density Function
gofTestCensored

Goodness-of-Fit Test for Normal or Lognormal Distribution Based on Censored Data
predict.lm

Predict Method for Linear Model Fits
plotLinearTrendTestDesign

Plots for a Sampling Design Based on a t-Test for Linear Trend
tolIntNparCoverage

Coverage for Nonparametric Tolerance Interval for Continuous Distribution
tolIntLnormCensored

Tolerance Interval for a Lognormal Distribution Based on Censored Data
signTest

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

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

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

Simultaneous Prediction Interval for a Normal Distribution
stripChart

1-D Scatter Plots with Confidence Intervals
zTestGevdShape

Test Whether the Shape Parameter of a Generalized Extreme Value Distribution is Equal to 0
ppointsCensored

Plotting Positions for Type I Censored Data
print.gofCensored

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

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

Prediction Interval for a Normal Distribution
Chi

The Chi Distribution
tolIntNormN

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

Test for the Presence of Serial Correlation
simulateMvMatrix

Simulate a Multivariate Matrix Based on a Specified Rank Correlation Mat
EPA.09.Ex.18.4.xylene.df

Xylene Concentrations from Example 18-4 of 2009 USEPA Guidance Document
EPA.92c.ccl4.df

Carbon Tetrachloride Concentrations from 1992 USEPA Guidance Document
EPA.09.Ex.14.8.df

Analyte Concentrations from Example 14-8 of 2009 USEPA Guidance Document
EPA.97.cadmium.111.df

Calibration Data for Cadmium at Mass 111
Lin.Evans.80.df

Fecal Coliform Data from the Illinois River
LognormalTruncAlt

The Truncated Lognormal Distribution (Alternative Parameterization)
ezmnorm

Estimate Parameters of a Zero-Modified Normal Distribution
plotAovDesign

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

Tolerance Interval for a Normal Distribution Based on Censored Data
tolIntPois

Tolerance Interval for a Poisson Distribution
tTestPower

Power of a One- or Two-Sample t-Test
EPA.89b.edb.df

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

Vinyl Chloride Data from Gibbons et al. (2009)
cv

Sample Coefficient of Variation.
ehyper

Estimate Parameter of a Hypergeometric Distribution
epois

Estimate Parameter of a Poisson Distribution
ezmlnorm

Estimate Parameters of a Zero-Modified Lognormal (Delta) Distribution
EPA.09.Ex.18.2.chrysene.df

Chrysene Concentrations from Example 18-2 of 2009 USEPA Guidance Document
EPA.09.Ex.21.2.benzene.df

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

The Generalized Extreme Value Distribution
EPA.09.Ex.14.3.alkalinity.df

Alkalinity Measures from Example 14-3 of 2009 USEPA Guidance Document
EPA.09.Table.9.4.nickel.vec

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

EnvStats Functions for Plotting Probability Distributions
FcnsByCatEstDistParams

EnvStats Functions for Estimating Distribution Parameters
EPA.09.Ex.20.1.nickel.df

Nickel Concentrations from Example 20-1 of 2009 USEPA Guidance Document
EPA.09.Ex.14.4.arsenic.df

Arsenic Concentrations from Example 14-4 of 2009 USEPA Guidance Document
EPA.09.Ex.17.4.copper.df

Copper Concentrations from Example 17-4 of 2009 USEPA Guidance Document
ZeroModifiedNormal

The Zero-Modified Normal Distribution
ciBinomHalfWidth

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

The Lognormal Distribution (Alternative Parameterization)
EPA.09.Ex.16.5.PCE.df

Tetrachloroethylene Concentrations from Example 16-5 of 2009 USEPA Guidance Document
EPA.92c.copper2.df

Copper Concentrations from 1992 USEPA Guidance Document
ciNormHalfWidth

Half-Width of Confidence Interval for Normal Distribution Mean or Difference Between Two Means
LognormalMix

Mixture of Two Lognormal Distributions
aovN

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

EnvStats Functions for Tolerance Intervals
ebeta

Estimate Parameters of a Beta Distribution
eqgeom

Estimate Quantiles of a Geometric Distribution
FcnsByCatCalibration

EnvStats Functions for Calibration
enorm

Estimate Parameters of a Normal (Gaussian) Distribution
boxcoxCensored.object

S3 Class "boxcoxCensored"
ZeroModifiedLognormalAlt

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

Pointwise Confidence Limits for Predictions
EPA.92c.arsenic3.df

Arsenic Concentrations from 1992 USEPA Guidance Document
equnif

Estimate Quantiles of a Uniform Distribution
eqbeta

Estimate Quantiles of a Beta Distribution
predIntNparSimultaneousConfLevel

Confidence Level of Simultaneous Nonparametric Prediction Interval for Continuous Distribution
pwMoment

Estimate Probability-Weighted Moments
simulateVector

Simulate a Vector of Random Numbers From a Specified Theoretical or Empirical Probability Distribution
EPA.89b.cadmium.df

Cadmium Concentrations from 1989 USEPA Guidance Document
eqpareto

Estimate Quantiles of a Pareto Distribution
EPA.89b.aldicarb1.df

Aldicarb Concentrations from 1989 USEPA Guidance Document
elnorm3

Estimate Parameters of a Three-Parameter Lognormal Distribution (Log-Scale)
ciNormN

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

Compute Confidence Level Associated with a Nonparametric Confidence Interval for a Quantile
eqnorm

Estimate Quantiles of a Normal Distribution
longToWide

Convert a Long Format Data Set into a Wide Format
FcnsByCatMCandRisk

EnvStats Functions for Monte Carlo Simulation and Risk Assessment
print.htest

Print Output of Hypothesis Tests
epdfPlot

Plot Empirical Probability Density Function
predIntNparConfLevel

Confidence Level for Nonparametric Prediction Interval for Continuous Distribution
eweibull

Estimate Parameters of a Weibull Distribution
predIntLnorm

Prediction Interval for a Lognormal Distribution
predIntLnormAltTestPower

Probability That at Least One Future Observation Falls Outside a Prediction Interval for a Lognormal Distribution
plotPredIntNparSimultaneousTestPowerCurve

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

Simultaneous Prediction Interval for a Gamma Distribution
egeom

Estimate Probability Parameter of a Geometric Distribution
FcnsByCatTrend

EnvStats Functions for Trend Analysis
ciBinomN

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

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

Sample Size for Simultaneous Nonparametric Prediction Interval for Continuous Distribution
propTestMdd

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

Nonparametric Prediction Interval for a Continuous Distribution
eqnpar

Estimate Quantiles of a Distribution Nonparametrically
gofOutlier.object

S3 Class "gofOutlier"
errorBar

Plot Pointwise Error Bars
twoSamplePermutationTestProportion

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

Sample Size for a One- or Two-Sample t-Test
epoisCensored

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

Estimate Quantiles of a Binomial Distribution
tolIntNormHalfWidth

Half-Width of a Tolerance Interval for a Normal Distribution
print.boxcoxLm

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

Test for Homogeneity of Variance Among Two or More Groups
propTestPower

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

One-Sample Chi-Squared Test on Variance
tTestScaledMdd

Scaled Minimal Detectable Difference for One- or Two-Sample t-Test
plotTTestLnormAltDesign

Plots for a Sampling Design Based on a One- or Two-Sample t-Test, Assuming Lognormal Data
plotTolIntNormDesign

Plots for a Sampling Design Based on a Tolerance Interval for a Normal Distribution
print.gof

Print Output of Goodness-of-Fit Tests
tolIntNormK

Compute the Value of $K$ for a Tolerance Interval for a Normal Distribution
EPA.92c.lognickel1.df

Log-transformed Nickel Concentrations from 1992 USEPA Guidance Document
quantileTest

Two-Sample Rank Test to Detect a Shift in a Proportion of the "Treated" Population
EPA.09.Ex.16.4.copper.df

Copper Concentrations from Example 16-4 of 2009 USEPA Guidance Document
HoskingEtAl1985

Abstract: Hosking et al. (1985)
boxcoxCensored

Boxcox Power Transformation for Type I Censored Data
eqlogis

Estimate Quantiles of a Logistic Distribution
FcnsByCatPrintPlot

EnvStats Functions for Printing and Plotting Objects of Various S3 Classes
print.gofOutlier

Print Output of Goodness-of-Fit Outlier Tests
tolIntLnorm

Tolerance Interval for a Lognormal Distribution
EPA.02d.Ex.2.ug.per.L.vec

Concentrations in Exhibit 2 of 2002d USEPA Guidance Document
EPA.92d.chromium.vec

Chromium Concentrations from 1992 USEPA Guidance Document
EnvStats-package

Package for Environmental Statistics, Including US EPA Guidance
boxcoxLm.object

S3 Class "boxcoxLm"
ecdfPlotCensored

Empirical Cumulative Distribution Function Plot Based on Type I Censored Data
elnormAltCensored

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

Geometric Mean
linearTrendTestScaledMds

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

Fisher's One-Sample Randomization (Permutation) Test for Location
EPA.94b.lead.df

Lead Concentrations from 1994 USEPA Guidance Document
plot.boxcoxCensored

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

Power of a t-Test for Linear Trend
EPA.92c.nickel1.df

Nickel Concentrations from 1992 USEPA Guidance Document
LognormalTrunc

The Truncated Lognormal Distribution
gofGroupTest

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

Plots for a Sampling Design Based on a One- or Two-Sample t-Test
print.permutationTest

Print Output of Permutation Tests
qqPlotGestalt

Develop Gestalt of Q-Q Plots for Specific Distributions
Distribution.df

Data Frame Summarizing Available Probability Distributions and Estimation Methods
EPA.89b.t29.df

T-29 Concentrations from 1989 USEPA Guidance Document
Empirical

The Empirical Distribution Based on a Set of Observations
calibrate

Fit a Calibration Line or Curve