Question: You need to show your work (formula setup, calculations, etc.) and state any properties or rules you need to solve the problems. 1) A tablet

You need to show your work (formula setup, calculations, etc.) and state any properties or rules you need to solve the problems.

1) A tablet PC contains 3217 music files. The distribution of file size is highly skewed with many small file sizes. Assume that the standard deviation for this population is 3.25 megabytes (MB).

(a) What is the standard deviation of the average file size when you take an SRS of 25 files from this population?

(b) What is the probability of getting an average file size greater than 15 MB for an SRS of 25 files if the average of all 3217 files is 14 MB?

(c) How many files (n) would you need to sample if you wanted the standard deviation of the average file size to be no larger than 0.50 MB?

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