Question: What sample size is required in order that the standard deviation of be: (a) 1/4 of the population standard deviation? (b) 1/7 of the

What sample size is required in order that the standard deviation of be:
(a) 1/4 of the population standard deviation?
(b) 1/7 of the population standard deviation?
(c) 12% of the population standard deviation?

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