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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 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 page generates a graph of the sampling distribution of the difference between two means and displays the probabilities associated with that distribution. Users enter the population standard deviation and the...
This page, created by Richard Lowry of Vassar College, generates a Poisson distribution, as approximated by the binomial. After clicking continue, users must enter the sample size (n>39) and probability of success...
Given the population incidence of a certain disease, and the conditional probabilities of positive and negative test results, what are the probabilities for a particular test result of a true positive, true negative,...

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