Question: Basic Computation: Sample Size Suppose x has a mound-shaped distribution with s 5 3. (a) Find the minimal sample size required so that for a

Basic Computation: Sample Size Suppose x has a mound-shaped distribution with s 5 3.

(a) Find the minimal sample size required so that for a 95% confi dence interval, the maximal margin of error is E 5 0.4.

(b) Check Requirements Based on this sample size, can we assume that the x distribution is approximately normal? Explain.

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