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The controls on this applet let you change the number of trials, the probability of success in each trial, and toggle between viewing either the difference between the number of successes and the expected number of...
Richard Lowry of Vassar College has created this page to display the sampling distribution and the standard error of the difference between two sample means. To calculate standard error, enter the standard deviation of...
Richard Lowry of Vassar College has created a java program to generate a graphic and numerical display of the properties of the Fdistributions, for any value of df_numerator and for values of df_denominator > = 5. When...
Richard Lowry of Vassar College has created this java script which calculates the areas under the curve of the normal distribution falling to the left of z, to the right of +z, and between z and +z. This page is v...
This website, created by David Howell of the University of Vermont, discusses the nature of data missing from research testing and how to deal with it. It also analyzes a specific data set throughout the text and...

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