This applet lets you estimate the regression line and to guess the value of Pearson's correlation.
Concepts: central tendency, mean, median, skew, least squares.
Fitness
of regression
This applet allows you to examine the effects of the reliability
of
X
and Y on a number of the components of the regression analysis.
concepts: reliability, standard error of estimate, slope, correlation.
Median,Mean
This applet demonstrates basic properties of the mean and median including .
Concepts: central tendency, mean, median, skew, least squares.
Sampling
distribution
This applet estimates and plots the sampling distribution of various statistics.
You specify the population distribution, sample size, and statistic. An animated
sample from the population is shown and the statistic is plotted. This can be
repeated to estimate the sampling distribution.
Concepts: sampling distribution, standard deviation, standard error, central limit theorem, mean, median, efficiency, fluctuation, skew, normal distribution
This applet simulates sampling from a population with a mean of 50 and a standard
deviation of 10 and estimates the confidence interval.
Concepts: confidence interval, mean, standard deviation.
Normal Approximation to the Binomial Distribution
This applet allows you to approximate a binomial distribution by a normal
distribution.
Concepts: binomial distribution, normal distribution, central limit theorem,
correction for continuity.
Confidence Interval on a Proportion
This applet shows the effect of violating the assumption that the sampling distribution of p is normal
Concepts: binomial distribution, normal distribution, central limit theorem, confidence interval.
This applet allows you to show a scatterplot of data from a bivariate distribution in which the relationship between the two variables is linear.
Concepts: Correlation, slope, standard error of the estimate, variance, restriction of range, proportion of variance explained.
Restriction
of Range
This applet showa taht the the range of X can be manipulated to investigate
its effect on Pearson's r and other aspects of the relationship between X and
Y
Concepts: Correlation, restriction of range, slope, standard error of estimate.
This applet lets you investigate differences between correlated and independent
t tests.
Concepts: t test, within-subject variable, between-subject variable,
power, repeated measures.
Chi Square
Test
This applet does the sampling and tests the significance of deviations from
these two distributions.
Concepts: goodness of fit, chi square, normal distribution, uniform distribution.
2 x 2
Contingency Tables
This applet simulates experiments using 2 x 2 contingency tables. You specify
the population proportions and the sample size and examine the effects on the
probability
of rejecting the null hypothesis.
Histogram,cross-validation
This applet demonstrates how a histogram is affected by bin width and starting
point of first bin. Illustrates cross-validation criterion for assessing histograms.
concepts: histogram, bin width, cross validation, density estimation.
Exponential
logarithmic functions
This applet shows how transformations affect the relationship between
two
variables.
L'applet permet de faitre des transformations logarithimiques,racine, carré,
d'une régression linéaire.
concepts: histogram, bin width, cross validation, density estimation.
Robustness
of t-test and ANOVA
This applet simulates t-test/ANOVA with normality and homogeneity of variance
assumptions
violated
Concepts: Assumptions, robustness, type I error rate, homogeneity of variance, normality.
One-way ANOVA
This applet shows partitioning of variance.
Concepts: ANOVA, sums of squares, partitioning
variance.
Two-way ANOVA
This applet shows partitioning of variance.
Concepts: ANOVA, sums of squares, partitioning variance, interaction.L'applet permet de voir ce qui se passe dans l'analyse de la variance à deux facteurs(ANOVA).