EPA.09.Ex.17.3.log.chrysene.df
Log-transformed Chrysene Concentrations from Example 17-3 of 2009 USEPA Guidance Document
Ammonia Nitrogen Concentrations in the Skagit River, Marblemount, Washington
Trichloroethylene Concentrations from Example 21-7 of 2009 USEPA Guidance Document
Euler's Constant
The Extreme Value (Gumbel) Distribution
Half-Width of Confidence Interval for Binomial Proportion or Difference Between Two Proportions
Estimate Quantiles of a Logistic Distribution
Benthic Data from Monitoring Program in Chesapeake Bay
Simulate a Multivariate Matrix Based on a Specified Rank Correlation Mat
Arsenic, Mercury and Strontium Concentrations in Table 9-3 of 2009 USEPA Guidance Document
Benzene Concentrations from 1992 USEPA Guidance Document
Sample Size for Specified Half-Width of Confidence Interval for Binomial Proportion or Difference Between Two Proportions
EPA.09.Ex.21.6.nitrate.df
Nitrate Concentrations from Example 21-6 of 2009 USEPA Guidance Document
Chlordane Concentrations from 1989 USEPA Guidance Document
EnvStats Functions for Estimating Distribution Quantiles
Plot Empirical Probability Density Function
Silver Concentrations From An Interlab Comparison
Copper Concentrations from 1992 USEPA Guidance Document
Sulfate Concentrations from 1989 USEPA Guidance Document
The Generalized Extreme Value Distribution
Goodness-of-Fit Test for Normal or Lognormal Distribution Based on Censored Data
S3 Class "summaryStats"
Chlordane Concentrations from 1989 USEPA Guidance Document
Plot Results of Group Goodness-of-Fit Test
Total Organic Carbon Concentrations from 1989 USEPA Guidance Document
Estimate Probability Parameter of a Geometric Distribution
Compute Sample Size Necessary to Achieve Specified Power for One-Way Fixed-Effects Analysis of Variance
Copper Concentrations from 1992 USEPA Guidance Document
Estimate Quantiles of a Lognormal Distribution Based on Type I Censored Data
EnvStats Functions for Printing and Plotting Objects of Various S3 Classes
EPA.09.Ex.22.2.Specific.Conductance.df
Specific Conductance from Example 22-2 of 2009 USEPA Guidance Document
EnvStats Functions for Calibration
EPA.09.Ex.21.2.benzene.df
Benzene Concentrations from Example 21-2 of 2009 USEPA Guidance Document
The Gamma Distribution (Alternative Parameterization)
Chromium Concentrations from 1992 USEPA Guidance Document
Boxcox Power Transformation for Type I Censored Data
Compute Lack-of-Fit and Pure Error Anova Table for a Linear Model
EnvStats Functions for Censored Data
EnvStats Functions for Summary Statistics and Plots
NIOSH Air Lead Levels Data
Abstract: Castillo and Hadi (1994)
Mixture of Two Lognormal Distributions (Alternative Parameterization)
Abstract: Hosking et al. (1985)
Mixture of Two Normal Distributions
Apply a Box-Cox Power Transformation to a Set of Data
The Truncated Lognormal Distribution (Alternative Parameterization)
Zinc Concentrations from 1992 USEPA Guidance Document
Chromium Concentrations from 1992 USEPA Guidance Document
Estimate Parameters of a Pareto Distribution
Plot Results of Box-Cox Transformations Based on Type I Censored Data
The Truncated Lognormal Distribution
The Chi Distribution
EPA.02d.Ex.9.mg.per.L.vec
Concentrations in Exhibit 9 of 2002d USEPA Guidance Document
Toluene Concentrations from 1992 USEPA Guidance Document
Estimate Quantiles of a Negative Binomial Distribution
Print Objects of Class "estimate"
Total Phosphorus Data from Chesapeake Bay
EPA.09.Ex.14.1.manganese.df
Manganese Concentrations from Example 14-1 of 2009 USEPA Guidance Document
EnvStats Functions for Tolerance Intervals
Nickel Concentrations from 1992 USEPA Guidance Document
The Three-Parameter Lognormal Distribution
Carbon Tetrachloride Concentrations from Example 12-1 of 2009 USEPA Guidance Document
EnvStats Functions for Data Transformations
Determine Detection Limit
Half-Width of a Prediction Interval for the next $k$ Observations from a Normal Distribution
Compute the Power of a One-Way Fixed-Effects Analysis of Variance
Table of Confidence Intervals for Proportion or Difference Between Two Proportions
EPA.09.Ex.15.1.manganese.df
Manganese Concentrations from Example 15-1 of 2009 USEPA Guidance Document
Plot Probability Density Function
Goodness-of-Fit Test
Nickel Concentrations from Example 10-1 of 2009 USEPA Guidance Document
Print Summary Statistics
Prediction Interval for a Normal Distribution
Estimate Parameters of a Normal (Gaussian) Distribution
Estimate Parameters of a Three-Parameter Lognormal Distribution (Log-Scale)
Show the EnvStats NEWS File
Estimate Parameter of a Binomial Distribution
Estimate Parameters for a Lognormal Distribution (Original Scale) Based on Type I Censored Data
Estimate Parameters of a Beta Distribution
S3 Class "estimate"
Sodium Concentrations from Example 17-7 of 2009 USEPA Guidance Document
Estimate Quantiles of a Zero-Modified Normal Distribution
Arsenic concentrations from Example 7.1 of 2009 USEPA Guidance Document
Estimate Parameters of an Extreme Value (Gumbel) Distribution
Summary Statistics
Estimate Quantiles of a Uniform Distribution
Generalized Pivotal Quantity for Confidence Interval for the Mean of a Normal Distribution Based on Censored Data
plotPredIntLnormAltTestPowerCurve
Power Curves for Sampling Design for Test Based on Prediction Interval for Lognormal Distribution
Generalized Pivotal Quantity for Tolerance Interval for a Normal Distribution Based on Censored Data
Estimate Probability Parameter of a Negative Binomial Distribution
EPA.09.Ex.16.1.sulfate.df
Sulfate Concentrations from Example 16-1 of 2009 USEPA Guidance Document
Tolerance Interval for a Poisson Distribution
Sample Size for a Nonparametric Prediction Interval for a Continuous Distribution
Compute the Power of a One- or Two-Sample Proportion Test
Plots for a Sampling Design Based on a Prediction Interval for the Next $k$ Observations from a Normal Distribution
S3 Class "gofCensored"
Plot Results of Goodness-of-Fit Test to Compare Two Samples
Estimate Quantiles of an Exponential Distribution
EPA.09.Ex.17.3.chrysene.df
Chrysene Concentrations from Example 17-3 of 2009 USEPA Guidance Document
Create Plots for a Sampling Design Based on a One-Way Fixed-Effects Analysis of Variance
EnvStats Functions for Prediction Intervals
Pointwise Confidence Limits for Predictions
Predict Concentration Using Calibration
S3 Class "permutationTest"
Estimate Quantiles of a Poisson Distribution
Trichloroethene concentrations in Table 9.1 of 2009 USEPA Guidance Document
Mixture of Two Lognormal Distributions
Full Complement of Summary Statistics
1,2,3,4-Tetrachlorobenzene Concentrations from 1994 USEPA Guidance Document
Log-transformed Nickel Concentrations from 1992 USEPA Guidance Document
Kendall's Nonparametric Test for Montonic Trend
Carbon Tetrachloride Concentrations from 1992 USEPA Guidance Document
predIntNparSimultaneousConfLevel
Confidence Level of Simultaneous Nonparametric Prediction Interval for Continuous Distribution
S3 Class "boxcox"
EPA.02d.Ex.2.ug.per.L.vec
Concentrations in Exhibit 2 of 2002d USEPA Guidance Document
plotPredIntNormSimultaneousTestPowerCurve
Power Curves for Sampling Design for Test Based on Simultaneous Prediction Interval for Normal Distribution
Sample Size for Specified Half-Width of Confidence Interval for Normal Distribution Mean or Difference Between Two Means
Rosner's Test for Outliers
Power of a t-Test for Linear Trend
Print Values
twoSamplePermutationTestLocation
Two-Sample or Paired-Sample Randomization (Permutation) Test for Location
Compute Confidence Level Associated with a Nonparametric Confidence Interval for a Quantile
Data Frame Summarizing Available Probability Distributions and
Estimation Methods
EPA.09.Ex.14.4.arsenic.df
Arsenic Concentrations from Example 14-4 of 2009 USEPA Guidance Document
One-Sample Chi-Squared Test on Variance
Half-Width of a Tolerance Interval for a Normal Distribution
EPA.09.Table.9.4.nickel.vec
Nickel Concentrations in Table 9-4 of 2009 USEPA Guidance Document
Quantile-Quantile (Q-Q) Plot for Type I Censored Data
Sample Size for a One- or Two-Sample t-Test, Assuming Lognormal Data
Coverage for Nonparametric Tolerance Interval for Continuous Distribution
Plots for Sampling Design Based on Confidence Interval for Mean of a Normal Distribution or Difference Between Two Means
Estimate Parameters for a Normal Distribution Based on Type I Censored Data
Plot Results of Goodness-of-Fit Test
plotPredIntNparSimultaneousTestPowerCurve
Power Curves for Sampling Design for Test Based on Nonparametric Simultaneous Prediction Interval
plotPredIntLnormAltSimultaneousTestPowerCurve
Power Curves for Sampling Design for Test Based on Simultaneous Prediction Interval for Lognormal Distribution
Nonparametric Test for Monotonic Trend Within Each Season Based on Kendall's Tau Statistic
Aldicarb Concentrations from 1989 USEPA Guidance Document
The Empirical Distribution Based on a Set of Observations
Plots for a Sampling Design Based on a Tolerance Interval for a Normal Distribution
Plots for a Sampling Design Based on a One- or Two-Sample t-Test, Assuming Lognormal Data
EnvStats Functions for Trend Analysis
Print Output of Goodness-of-Fit Outlier Tests
Compute Sample Size Necessary to Achieve a Specified Power for a One- or Two-Sample Proportion Test
Plot Pointwise Error Bars
Plotting Positions for Type I Censored Data
Ozone Concentrations in the Northeast U.S.
Coefficient of Skewness
S3 Class "boxcoxLm"
Lead Concentrations from 1994 USEPA Guidance Document
Print Output of Goodness-of-Fit Tests Based on Censored Data
Estimate Mean, Standard Deviation, and Standard Error Nonparametrically Based on Censored Data
Simultaneous Prediction Interval for a Normal Distribution
Estimate Quantiles of a Binomial Distribution
Tolerance Interval for a Normal Distribution
The Zero-Modified Lognormal (Delta) Distribution
Empirical Cumulative Distribution Function Plot Based on Type I Censored Data
Geometric Mean
Plots for a Sampling Design Based on a Nonparametric Tolerance Interval
Estimate Mean of a Poisson Distribution Based on Type I Censored Data
Plots for Sampling Design Based on Confidence Interval for Binomial Proportion or Difference Between Two Proportions
Model Predictions
Estimate Parameters of Gamma Distribution
Develop Gestalt of Q-Q Plots for Specific Distributions
Print Output of Group Goodness-of-Fit Tests
Tetrachloroethylene Concentrations from Example 16-5 of 2009 USEPA Guidance Document
Print Output of Hypothesis Tests Based on Censored Data
Two-Sample Rank Test to Detect a Shift in a Proportion of the "Treated" Population
Nickel Concentrations from Example 20-1 of 2009 USEPA Guidance Document
Estimate Mean and Coefficient of Variation for a Gamma Distribution Based on Type I Censored Data
Power of a One- or Two-Sample t-Test
S3 Class "htestCensored"
Estimate Parameters for a Lognormal Distribution (Log-Scale) Based on Type I Censored Data
Estimate Quantiles of a Generalized Extreme Value Distribution
Estimate Quantiles of a Normal Distribution Based on Type I Censored Data
Tolerance Interval for a Normal Distribution Based on Censored Data
Estimate Parameters of a Zero-Modified Normal Distribution
Plot Results of Goodness-of-Fit Test Based on Censored Data
Compute p-Value for the Quantile Test
Scaled Minimal Detectable Difference for One- or Two-Sample t-Test
Quantile-Quantile (Q-Q) Plot
Print Output of Goodness-of-Fit Tests
EPA.09.Ex.21.5.beryllium.df
Beryllium Concentrations from Example 21-5 of 2009 USEPA Guidance Document
Plot Results of Box-Cox Transformations for a Linear Model
EnvStats Probability Distributions and Random Numbers
Expected Value of Order Statistics from Random Sample from Standard Normal Distribution
Two-Sample Linear Rank Test to Detect a Difference Between Two Distributions
EnvStats Functions for Power and Sample Size Calculations
Gibbons.et.al.09.Alkilinity.vec
Alkilinity Data from Gibbons et al. (2009)
Print Output of Permutation Tests
Sample Size for Simultaneous Nonparametric Prediction Interval for Continuous Distribution
Cadmium Concentrations from 1989 USEPA Guidance Document
Copper and Zinc Concentrations in Shallow Ground Water
Print Objects of Class "estimateCensored"
S3 Class "gofOutlier"
Estimate Probability-Weighted Moments
Scaled Minimal Detectable Slope for a t-Test for Linear Trend
Compute the Value of $K$ for a Tolerance Interval for a Normal Distribution
plotLinearTrendTestDesign
Plots for a Sampling Design Based on a t-Test for Linear Trend
Arsenic Concentrations from 1992 USEPA Guidance Document
Calibration Data for Cadmium at Mass 111
Sample Size for a One- or Two-Sample t-Test
Sample Size for Nonparametric Confidence Interval for a Quantile
Estimate Quantiles of a Gamma Distribution
Test for Homogeneity of Variance Among Two or More Groups
EnvStats Functions for Hypothesis Tests
Estimate Quantiles of a Lognormal Distribution
Estimate Quantiles of a Three-Parameter Lognormal Distribution
S3 Class "gofTwoSample"
Estimate Shape and Scale Parameters for a Gamma Distribution Based on Type I Censored Data
EPA.09.Ex.11.1.arsenic.df
Arsenic Concentrations from Example 11-1 of 2009 USEPA Guidance Document
Estimate Parameter of a Poisson Distribution
Plot Results of Permutation Test
Estimate Quantiles of a Normal Distribution
Estimate Quantiles of a Geometric Distribution
Geometric Standard Deviation.
plotPredIntNparSimultaneousDesign
Plots for a Sampling Design Based on a Simultaneous Nonparametric Prediction Interval
Sample Size for a Specified Half-Width of a Tolerance Interval for a Normal Distribution
EPA.09.Ex.12.4.naphthalene.df
Naphthalene Concentrations from Example 12-4 of 2009 USEPA Guidance Document
Analyte Concentrations from Example 14-8 of 2009 USEPA Guidance Document
EPA.09.Ex.17.5.chloride.df
Chloride Concentrations from Example 17-5 of 2009 USEPA Guidance Document
Log-transformed Lead Concentrations from 1989 USEPA Guidance Document
Helsel.Hirsch.02.Mayfly.df
Paired Counts of Mayfly Nymphs Above and Below Industrial Outfalls
Estimate $L$-Moments
Plot Results of Box-Cox Transformations
Tolerance Interval for a Lognormal Distribution Based on Censored Data
twoSamplePermutationTestProportion
Randomization (Permutation) Test to Compare Two Proportions (Fisher's Exact Test)
Test Whether the Shape Parameter of a Generalized Extreme Value Distribution is Equal to 0
The Triangular Distribution
Empirical Cumulative Distribution Function Plot
Sample Coefficient of Variation.
Estimate Parameters of a Logistic Distribution
Sample Size for Nonparametric Tolerance Interval for Continuous Distribution
Estimate Quantiles of a Hypergeometric Distribution
Estimate Parameter of a Hypergeometric Distribution
Estimate Quantiles of a Weibull Distribution
Simultaneous Prediction Interval for a Lognormal Distribution
Copper Concentrations from Example 17-4 of 2009 USEPA Guidance Document
Benzene Concentrations from 1992 USEPA Guidance Document
Chrysene Concentrations from 1992 USEPA Guidance Document
Arsenic Concentrations from 1992 USEPA Guidance Document
Nickel Concentrations from 1992 USEPA Guidance Document
Modified 1,2,3,4-Tetrachlorobenzene Data with Censored Values
EnvStats Functions for Monte Carlo Simulation and Risk Assessment
Ethylene Thiourea Dose-Response Data
The Pareto Distribution
Estimate Quantiles of a Distribution Nonparametrically
Estimate Quantiles of a Zero-Modified Lognormal (Delta) Distribution
Prediction Interval for Gamma Distribution
predIntNparSimultaneousTestPower
Probability That at Least One Set of Future Observations Violates the Given Rule Based on a Nonparametric Simultaneous Prediction Interval
Nonparametric Simultaneous Prediction Interval for a Continuous Distribution
Print Output of Two-Sample Goodness-of-Fit Tests
EPA.09.Ex.16.2.benzene.df
Benzene Concentrations from Example 16-2 of 2009 USEPA Guidance Document
Trichloroethylene Concentrations from Example 18-3 of 2009 USEPA Guidance Document
Sulfate Concentrations from Example 6-3 of 2009 USEPA Guidance Document
EDB Concentrations from 1989 USEPA Guidance Document
Atmospheric Environmental Conditions in New York City
Fecal Coliform Data from the Illinois River
Carbon Monoxide Emissions from Oil Refinery.
S3 Class "boxcoxCensored"
Estimate Parameters of a Generalized Extreme Value Distribution
Estimate Quantiles of a Pareto Distribution
Plots for Sampling Design Based on One- or Two-Sample Proportion Test
Plots for Sampling Design Based on Nonparametric Confidence Interval for a Quantile
EPA.09.Ex.18.1.arsenic.df
Arsenic Concentrations from Example 18-1 of 2009 USEPA Guidance Document
Xylene Concentrations from Example 18-4 of 2009 USEPA Guidance Document
Manganese Concentrations from 1989 USEPA Guidance Document
Arsenic Concentrations from 1992 USEPA Guidance Document
Gibbons.et.al.09.Vinyl.Chloride.vec
Vinyl Chloride Data from Gibbons et al. (2009)
The Lognormal Distribution (Alternative Parameterization)
The Truncated Normal Distribution
Chen's Modified One-Sided t-test for Skewed Distributions
Plot Cumulative Distribution Function
Estimate Rate Parameter of an Exponential Distribution
Estimate Quantiles of a Beta Distribution
S3 Class "estimateCensored"
Sample Size for a Specified Half-Width of a Prediction Interval for the next $k$ Observations from a Normal Distribution
tTestLnormAltRatioOfMeans
Minimal or Maximal Detectable Ratio of Means for One- or Two-Sample t-Test, Assuming Lognormal Data
Print Output of Objective for Box-Cox Power Transformations
Nonparametric Tolerance Interval for a Continuous Distribution
Tolerance Interval for a Gamma Distribution
EPA.02d.Ex.4.mg.per.kg.vec
Concentrations in Exhibit 4 of 2002d USEPA Guidance Document
Iron Concentrations from Example 13-1 of 2009 USEPA Guidance Document
EPA.09.Ex.18.2.chrysene.df
Chrysene Concentrations from Example 18-2 of 2009 USEPA Guidance Document
EPA.09.Ex.19.5.mercury.df
Mercury Concentrations from Example 19-5 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.19.1.sulfate.df
Sulfate Concentrations from Example 19-1 of 2009 USEPA Guidance Document
EPA.09.Ex.17.2.toluene.df
Toluene Concentrations from Example 17-2 of 2009 USEPA Guidance Document
Interquartile Range
Prediction Interval for a Lognormal Distribution
Package for Environmental Statistics, Including US EPA Guidance
Prediction Interval for a Poisson Distribution
predIntLnormAltSimultaneousTestPower
Probability That at Least One Set of Future Observations Violates the Given Rule Based on a Simultaneous Prediction Interval for a Lognormal Distribution
Plot Two Cumulative Distribution Functions
S3 Class "htest"
S3 Class "gof"
Print Output of Objective for Box-Cox Power Transformations Based on Type I Censored Data
The Zero-Modified Lognormal (Delta) Distribution (Alternative Parameterization)
1-D Scatter Plots with Confidence Intervals
Aldicarb Concentrations from 1989 USEPA Guidance Document
Type I Error Level for a One- or Two-Sample t-Test
Benzene Concentrations from 1989 USEPA Guidance Document
EPA.09.Ex.14.3.alkalinity.df
Alkalinity Measures from Example 14-3 of 2009 USEPA Guidance Document
Estimate Parameters of a Uniform Distribution
Table of Confidence Intervals for Mean or Difference Between Two Means
Convert a Long Format Data Set into a Wide Format
T-29 Concentrations from 1989 USEPA Guidance Document
Probability That at Least One Future Observation Falls Outside a Prediction Interval for a Normal 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
EnvStats Functions for Estimating Distribution Parameters
Fit a Calibration Line or Curve
Ammonium Concentration in Precipitation Measured at Olympic National Park Hoh Ranger Station
EnvStats Functions Listed by Category
Example of Multiply Left-censored Data from Literature
Coefficient of (Excess) Kurtosis
Simulate a Vector of Random Numbers From a Specified Theoretical or Empirical Probability Distribution
Plot Two Cumulative Distribution Functions Based on Censored Data
Power of a One- or Two-Sample t-Test Assuming Lognormal Data
S3 Class "calibrate"
S3 Class "gofGroup"
EPA.09.Ex.21.1.aldicarb.df
Aldicarb Concentrations from Example 21-1 of 2009 USEPA Guidance Document
Goodness-of-Fit Test for a Specified Probability Distribution for Groups
Simultaneous Prediction Interval for a Gamma Distribution
Plots for a Sampling Design Based on a Nonparametric Prediction Interval
Base $b$ Representation of a Number
One-Sample or Paired-Sample Sign Test on a Median
Probability That at Least One Future Observation Falls Outside a Prediction Interval for a Lognormal Distribution
Compute the Value of $K$ for a Simultaneous Prediction Interval for a Normal Distribution
EPA.02d.Ex.6.mg.per.kg.vec
Concentrations in Exhibit 6 of 2002d USEPA Guidance Document
Print Output of Objective for Box-Cox Power Transformations for an "lm" Object
Minimal Detectable Difference Associated with a One- or Two-Sample Proportion Test
Estimate Parameters of a Weibull Distribution
Copper Concentrations from Example 16-4 of 2009 USEPA Guidance Document
Test for the Presence of Serial Correlation
EnvStats Functions for Plotting Probability Distributions
Tolerance Interval for a Lognormal Distribution
twoSampleLinearRankTestCensored
Two-Sample Linear Rank Test to Detect a Difference Between Two Distributions Based on Censored Data
The Zero-Modified Normal Distribution
Boxcox Power Transformation
Estimate Parameters of a Lognormal Distribution (Log-Scale)
Fisher's One-Sample Randomization (Permutation) Test for Location
plotPredIntNormTestPowerCurve
Power Curves for Sampling Design for Test Based on Prediction Interval for Normal Distribution
Nonparametric Prediction Interval for a Continuous Distribution
Compute the Value of $K$ for a Prediction Interval for a Normal Distribution
Vinyl Chloride Concentrations from Example 22-1 of 2009 USEPA Guidance Document
Estimate Parameters of a Lognormal Distribution (Original Scale)
Plots for a Sampling Design Based on a One- or Two-Sample t-Test
Confidence Level for Nonparametric Prediction Interval for Continuous Distribution
Lead Concentrations from 1989 USEPA Guidance Document
Trichloroethylene Concentrations Before and After Remedation
EnvStats Functions for Goodness-of-Fit Tests
EPA.09.Ex.17.6.sulfate.df
Sulfate Concentrations from Example 17-6 of 2009 USEPA Guidance Document
Half-Width of Confidence Interval for Normal Distribution Mean or Difference Between Two Means
Estimate Quantiles of an Extreme Value (Gumbel) Distribution
Confidence Level for Nonparametric Tolerance Interval for Continuous Distribution
Estimate Parameters of a Zero-Modified Lognormal (Delta) Distribution
Print Output of Hypothesis Tests
EPA.09.Ex.19.2.chloride.df
Chloride Concentrations from Example 19-2 of 2009 USEPA Guidance Document
Sample Size for a t-Test for Linear Trend
Predict Method for Linear Model Fits