Atmospheric carbon and D14C measurements
Calculation and display of concordant and discordant pairs
May's effective specialization index
Barro Colorado Island Tree Counts
Tree presence/absence data from Barro Colorado island
Brunner-Dette-Munk test
Doornik-Hansen test for multivariate normality.
Agresti-Pendergrast test
Simple functions for MCMC demonstrations
Bayesian graphical summaries for discrete or categorical data.
Mahalanobis distance for two sites using a pooled covariance matrix
Geometric mean
Soil potassium analyses from 8 laboratories
Venn probability diagrams for an event with two outcomes
Maximum likelihood algorithm for determining the binomial dispersal coefficient
Animated plot of the least squares function.
Agrostis variabilis cover measurements
Animation of Markov Chain Monte Carlo walks in bivariate normal space
Hodges-Lehman estimator of location
Harmonic mean
Alpine soil temperature and moisture time series
CSIRO d13C-CO2 data from Rubino et al., A revised 1000 year atmospheric 13C-CO2 record from Law Dome and South Pole, Antarctica
Kullback test for equal covariance matrices.
Calculates kappa statistic and other classification error statistics
Animated depictions of Lotka-Volterra competition and exploitation models
Glucose Levels Following Alcohol Ingestion
PCBs and herring egg thickness
Split plot computer chip data from Littell et al. (2006)
Sample mode
Asthma repeated measures dataset from Littell et al. (2002)
Aids and veterans dataset
Animated demonstration of frequentist binomial convergence of probability using a coin flip.
PM 2.5 pollutant data from Pocatello Idaho.
Mack-Skillings test
Area under a receiver operating characteristic (ROC) curve
Monte Carlo hypothesis testing for two samples.
An agricultural split plot design
Anscombe's quartet
Animation demonstrations of confidence intervals.
Animated demonstration of density for a continuous pdf
Bootstrap confidence intervals
Angle of azimuth to a boundary.
Agricultural factorial design
Mountain goat data from Yellowstone National Park
Barplots with error bars (including interval plots)
Animated depiction of six-sided die throws.
Preston diversity analysis
Fern environmental sex determination data
Confidence interval for the product of two proportions
crab gill and body weight data
Animated depictions of population growth
Conversion of binary digits to decimal numbers
Animated plots of log-likelihood functions
Animated plot of least squares function.
Bombus pollen data.
Agresti crabs dataset
Dissolved levels in locations above and below a town
Tippett cuckoo egg data
Likelihood ratio test for tabular data
Baby walking times experimental data
Huber M-estimator iterative least squares algorithm
Heart rate data from Milliken and Johnson (2009)
R hat MCMC convergence statistic
Garment Latin square data from Littell et al. (2002)
Creosote bush counts
Bone development data
Make plots of bivariate normal distributions
Confidence interval for the median
Bat forearm length as a function of bat age
Caribou count data
Pulldown menus for 'asbio' interactive graphical functions
Mosquito wing length data
Datasets for resource use and availability
Welch tests controlled for simultaneous inference
Permutation test for two and three way factorial designs
Z and t confidence intervals for mu.
Functions for customizing correlation matrices
Functions for calculating alpha diversity.
Mouse life expectancy data
Power analysis for a one sample z-test
Gibbs sampling of normal hierarchical models
prediction sum of squares
Magnet pain relief data
Portneuf River longitudinal N and P data
Polyamine data from Hollander and Wolfe (1999)
One sided confidence interval for mu.
Nitrogen content of soils under pika haypiles
Ant honeydew data
Confidence intervals for the ratio of binomial and multinomial proportions
Confidence intervals for ratios of proportions when the denominator is known
Efficiency of a randomized block design compared to a CRD
Confidence interval estimation for the binomial parameter pi using five popular methods.
Confidence interval for sigma squared.
Mule deer telemetry data
Florida state death penalty data
Confidence intervals for stratified random samples.
Fire data from Yellowstone National Park
Wood boring beetle data.
Modified Levene's test
Enzymatic rate data for the phospholipase protein ExoU
CO2 exchange time series data
Mountain island biogeographic data
Unbalanced and balanced linear models
Visualize the Hardy Weinberg equilibrium
Fly sex and longevity
Calculates joint confidence intervals for parameters in linear models using a Bonferroni procedure.
Kaplan-Meier survivorship.
Determine agreement of two classifications
Interactive worksheet for logical and fallacious arguments
Bromus tectorum dataset
Visualize t-tests
Conducts pairwise post hoc and planned comparisons associated with an ANOVA
Loess 2D and 3D smooth plots
Creates plots for one way ANCOVAs
Plots a simple linear regression along with confidence and prediction intervals.
AIC, AICc, BIC, Mallow's Cp, and PRESS evaluation of linear models
Paik diagrams
Dataset of mammal traits from Ramsey and Schaefer (1997)
Environmental data for the community dataset cliff.sp
Dataset of salary attributes for male and female workers from Ramsey and Schafer (1997)
Bivariate boxplots
Biweight midvariance, and biweight midcorrelation.
Perpendicularity
Prostate cancer data
Interactive depiction of type I and II error
Visualize the sampling distribution of Pearson's product moment correlation
Depiction of the effect of random level selection on inferences concerning fixed effects
Visualize ANCOVA mechanics
Interactive depiction of the multinomial distribution
Interactive depiction of the ANOVA mechanism
Shading functions for interpretation of pdf probabilities.
Yellowstone NP cliff community data
Refinery CO dataset
One sample t-test
GUI display of probability
Fisher's Rothamsted potato data
Jacknife pseudo-values
Potash/cotton strength data
Random draws from a scaled inverse chi-square distribution
One sample z-test
Transition matrix analysis
Anolis lizard contingency table data
Animated depiction of experimental designs
Animated demonstration of randomized sampling designs
ANOVA linear models
Grizzly bear litter sizes
Bayesian linear models with uniform priors
Bootstrap CI of M-estimators differences of two samples
Jackknife standard error from a set of pseudovalues
Normal quantile plots for single or multiple factor levels
Variance and standard error estimators for the sampling distribution of the sample mean
Matched pairs schizophrenia data
Winsorize data
Trim data
Visualize pdfs
Regression linear model derivation from linear algebra
Interactive depiction of type I and type II error and power
A simple function for bootstrapping
DEM data from the Starkey experimental forest in NE Oregon
Chronic ailment counts for urban and rural women in Australia
Chi plots for diagnosing multivariate independence.
Concrete strength dataset for data mining
del14C in the atmosphere from 1700-1950
American gizzard shad data
Interactive depiction of ROC curves
Interactive self-testing questions
Interactive smoother demonstrations
Species richness and environmental variables from Mt Washburn
Scandinavian site by species community matrix
Esophageal cancer data modified slightly to create a balanced three-way
factorial design
Huber M-estimator of location
Facebook performance metrics for data mining and machine learning
Contingency data for high school marijuana, alcohol, and cigarette use
Repeated measures data for an exercise experiment.
Hamilton depression scores before and after drug treatment
Corn yield data
Maternal deer data
Huber one step M-estimator
Patient responses to myeloma drug treatments
White wine quality data for data mining
Fruit weight data from Littell et al. (2002)
Visual illusions illustrating human perception errors.
Australian frog calls following fire
Ipomopsis fruit yield data
Nearest neighbor boundary coordinates
Salsify height dataset
World CO2 levels, by country, from 1980 to 2006
Population levels in various countries from 1980-2006
Multiple pairwise comparison procedure to accompany a Friedman test.
Multiple pairwise comparison procedure to accompany a Kruskal-Wallis test
Partial correlations of determination in multiple regression
Plant traits for 136 species
Mammalian BMR and biomass data from Savage et al. (2004)
Animated representation of sampling distribution basics
Plots confidence intervals and/or bars with letters indicating significant differences for objects from class pairw
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
Percentage bend correlation
Partial residual plots for interpretation of multiple regression.
Visualization of the M-estimation function
Interactive depiction of precision and accuracy
Depict the effect of range on correlation
Visualize random effects model
Visualize exponential power functions
Demonstration of regression mechanics
SO2 data for 32 US cities with respect to 6 explanatory variables
Spider web length data
Snoring and heart disease contingency data
Robust test for random factors using trimmed means.
Visualize important non-linear functions
Interactive visualization of least squares regression.
Agricultural randomized block design
Robust one way trimmed means test.
Compilations of genus and species counts from Simberloff (1970)
Sample skewness and kurtosis
Tukey's test of additivity.
Veneer data from Littell et al. (2002)
Wildebeest carcass categorical data
Whickham contingency table data for smokers and survivorship