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Pollsters often use randomly selected digits between 0 and 9 to generate parts of telephone numbers to he called. What is the distribution of such

Pollsters often use randomly selected digits between 0 and 9 to generate parts of telephone numbers to he called. What is the distribution of such randomly selected digits? If we repeat the process of randomly generating 50 digits and finding the mean, what is the distribution of the resulting sample means?

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