A directory of useful objects found on the web for teaching Maths.
simulate repeated random sampling, from a variety of distributions and a range of sample sizes, to illustrate properties of the distribution of X⎯⎯⎯ X¯ across samples of a fixed size nn, including its mean μμ, its standard deviation σ/n‾√σ/n (where μμ and σσ are the mean and standard deviation of XX), and its approximate normality if nn is large
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