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This site, created by author William M.K. Trochim, describes in detail five different types of random sampling. Some of these types include: simple random, stratified random, systematic random, cluster random,...
This applet, created by Tom Malloy of the University of Utah, demonstrates probability as the area under the normal and the standard normal curves. Students can manipulate mean, standard deviation, and lower and upper...
This applet allows you to explore the validity of confidence intervals on a proportion with various values for sample size (N) and population proportion (Pi). After you specify N, Pi, the level of confidence, and the...
This chapter of the HyperStat Online Textbook discusses in detail sampling distributions of various statistics (mean, median, proportions, correlation, etc.), differences between such statistics, the Central Limit...
This applet, created by Philip B. Stark of the University of California, Berkeley, illustrates this concept of the sampling distribution of a statistic by simulating the sampling distribution of the sample sum, mean,...

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