Doornik-Hansen test for multivariate normality.
Calculation and display of concordant and discordant pairs
Mahalanobis distance for two sites using a pooled covariance matrix
Simple functions for MCMC demonstrations
Monte Carlo hypothesis testing for two samples.
R hat MCMC convergence statistic
May's effective specialization index
Tree presence/absence data from Barro Colorado island
Glucose Levels Following Alcohol Ingestion
CSIRO d13C-CO2 data from Rubino et al., A revised 1000 year atmospheric 13C-CO2 record from Law Dome and South Pole, Antarctica
Frigatebird drumming frequency data
Geometric mean
Maximum likelihood algorithm for determining the binomial dispersal coefficient
Mack-Skillings test
Agrostis variabilis cover measurements
Brunner-Dette-Munk test
Harmonic mean
Alpine soil temperature and moisture time series
Sample mode
Aids and veterans dataset
Anolis lizard contingency table data
Agresti-Pendergrast test
Barro Colorado Island Tree Counts
Hodges-Lehman estimator of location
Soil potassium analyses from 8 laboratories
Fern environmental sex determination data
PM 2.5 pollutant data from Pocatello Idaho
Venn probability diagrams for an event with two outcomes
PCBs and herring egg thickness
Animated plot of least squares function.
Animated plot of the least squares function.
Ant honeydew data
Preston diversity analysis
Animation demonstrations of confidence intervals.
Split plot computer chip data from Littell et al. (2006)
An agricultural split plot design
Asthma repeated measures dataset from Littell et al. (2002)
Bombus pollen data.
Animated demonstration of density for a continuous pdf
Animated demonstration of frequentist binomial convergence of probability using a coin flip.
Functions for calculating alpha diversity.
Animated depictions of population growth
Animation of Markov Chain Monte Carlo walks in bivariate normal space
Animated depiction of six-sided die throws.
Animated demonstration of randomized sampling designs
Animated plots of log-likelihood functions
Bone development data
Grizzly bear litter sizes
Wood boring beetle data
Bivariate boxplots
Z and t confidence intervals for mu.
Bat forearm length as a function of bat age
Area under a receiver operating characteristic (ROC) curve
Bayesian linear models with uniform priors
Make plots of bivariate normal distributions
Baby walking times experimental data
Pulldown menus for 'asbio' interactive graphical functions
Chronic ailment counts for urban and rural women in Australia
Confidence interval for the product of two proportions
Anscombe's quartet
Determine agreement of two classifications
Confidence interval for the median
One sided confidence interval for mu.
Confidence intervals for stratified random samples.
Confidence intervals for ratios of proportions when the denominator is known
Confidence interval for sigma squared.
Dissolved levels in locations above and below a town
Bootstrap confidence intervals
Environmental data for the community dataset cliff.sp
Conversion of binary digits to decimal numbers
Agresti crabs dataset
A simple function for bootstrapping
Angle of azimuth to a boundary.
Bootstrap CI of M-estimators differences of two samples
Florida state death penalty data
Esophageal cancer data modified slightly to create a balanced three-way
factorial design
Corn yield data
Bayesian graphical summaries for discrete or categorical data.
Facebook performance metrics for data mining and machine learning
Mule deer telemetry data
crab gill and body weight data
Atmospheric carbon and D14C measurements
Tippett cuckoo egg data
Dataset of salary attributes for male and female workers from Ramsey and Schafer (1997)
Calculates kappa statistic and other classification error statistics
Efficiency of a randomized block design compared to a CRD
Chi plots for diagnosing multivariate independence.
Fly sex and longevity
Fire data from Yellowstone National Park
Ipomopsis fruit yield data
Calculates joint confidence intervals for parameters in linear models using a Bonferroni procedure.
Enzymatic rate data for the phospholipase protein ExoU
Maternal deer data
Confidence intervals for the ratio of binomial and multinomial proportions
Confidence interval estimation for the binomial parameter pi using five popular methods.
Hamilton depression scores before and after drug treatment
Animated depiction of experimental designs
Kullback test for equal covariance matrices.
Datasets for resource use and availability
Contingency data for high school marijuana, alcohol, and cigarette use
Animated depictions of Lotka-Volterra competition and exploitation models
Garment Latin square data from Littell et al. (2002)
Barplots with error bars (including interval plots)
Repeated measures data for an exercise experiment.
Mountain goat data from Yellowstone National Park
Bromus tectorum dataset
Mosquito wing length data
Kaplan-Meier survivorship.
Australian frog calls following fire
Agricultural factorial design
Heart rate data from Milliken and Johnson (2009)
Caribou count data
Magnet pain relief data
Creosote bush counts
Dataset of mammal traits from Ramsey and Schaefer (1997)
Yellowstone NP cliff community data
Concrete strength dataset for data mining
Paik diagrams
Fruit weight data from Littell et al. (2002)
Huber M-estimator iterative least squares algorithm
Conducts pairwise post hoc and planned comparisons associated with an ANOVA
Gibbs sampling of normal hierarchical models
Likelihood ratio test for tabular data
Polyamine data from Hollander and Wolfe (1999)
Huber one step M-estimator
Modified Levene's test
Huber M-estimator of location
Portneuf River longitudinal N and P data
Patient responses to myeloma drug treatments
Mountain island biogeographic data
Visual illusions illustrating human perception errors.
Mouse life expectancy data
Partial correlations of determination in multiple regression
Power analysis for a one sample z-test
One sample t-test
Nearest neighbor boundary coordinates
Percentage bend correlation
AIC, AICc, BIC, Mallow's Cp, and PRESS evaluation of linear models
Partial residual plots for interpretation of multiple regression.
Multiple pairwise comparison procedure to accompany a Friedman test.
prediction sum of squares
One sample z-test
Multiple pairwise comparison procedure to accompany a Kruskal-Wallis test
Plant traits for 136 species
Plots confidence intervals and/or bars with letters indicating significant differences for objects from class pairw
Welch tests controlled for simultaneous inference
Functions for customizing correlation matrices
Rat glycogen data from Sokal and Rohlf (2012)
A multivariate normal dataset for data mining
Animated and/or snapshot representations of a statistic's sampling distribution
Potash/cotton strength data
Creates plots for one way ANCOVAs
Fisher's Rothamsted potato data
Visualize exponential power functions
Depict the effect of range on correlation
Permutation test for two and three way factorial designs
Unbalanced and balanced linear models
Nitrogen content of soils under pika haypiles
Plots a simple linear regression along with confidence and prediction intervals.
Biweight midvariance, and biweight midcorrelation.
Interactive worksheet for logical and fallacious arguments
Prostate cancer data
Matched pairs schizophrenia data
Visualize the sampling distribution of Pearson's product moment correlation
Jackknife standard error from a set of pseudovalues
Perpendicularity
Interactive depiction of ROC curves
Interactive visualization of least squares regression.
Interactive smoother demonstrations
Normal quantile plots for single or multiple factor levels
Jacknife pseudo-values
Refinery CO dataset
Random draws from a scaled inverse chi-square distribution
CO2 exchange time series data
Visualize the Hardy Weinberg equilibrium
Visualize important non-linear functions
Visualization of the M-estimation function
Animated representation of sampling distribution basics
Visualize pdfs
Interactive depiction of type I and type II error and power
Mammalian BMR and biomass data from Savage et al. (2004)
Regression linear model derivation from linear algebra
ANOVA linear models
del14C in the atmosphere from 1700-1950
Interactive depiction of the ANOVA mechanism
Visualize ANCOVA mechanics
Tukey's test of additivity.
Salsify height dataset
Compilations of genus and species counts from Simberloff (1970)
Interactive depiction of precision and accuracy
Veneer data from Littell et al. (2002)
Sample skewness and kurtosis
Depiction of the effect of random level selection on inferences concerning fixed effects
Interactive depiction of the multinomial distribution
Greenhouse gas emissions from Our World in Data
Visualize random effects model
World CO2 levels, by country, from 1980 to 2006
Demonstration of regression mechanics
Interactive self-testing questions
Winsorize data
White wine quality data for data mining
Visualize t-tests
American gizzard shad data
Interactive depiction of type I and II error
Robust test for random factors using trimmed means.
Robust one way trimmed means test.
Shading functions for interpretation of pdf probabilities.
Transition matrix analysis
Trim data
GUI display of probability
Wildebeest carcass categorical data
Spider web length data
Snoring and heart disease contingency data
Agricultural randomized block design
SO2 data for 32 US cities with respect to 6 explanatory variables
DEM data from the Starkey experimental forest in NE Oregon
Variance and standard error estimators for the sampling distribution of the sample mean
Scandinavian site by species community matrix
Species richness and environmental variables from Mt Washburn
Whickham contingency table data for smokers and survivorship
Population levels in various countries from 1980-2006