Samples of size n = 20 are randomly selected from 4 different bins of DVDs ranging in price from $4.99 to $9.99. You return each DVD before randomly drawing another and calculate the variance of each

Samples of size n = 20 are randomly selected from 4 different bins of DVDs ranging in price from $4.99 to $9.99. You return each DVD before randomly drawing another and calculate the variance of each sample. What is the distribution of the sample variance?

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