Question: Basic Computation: Sample Size Suppose x has a normal distribution with s 5 1.2. (a) Find the minimal sample size required so that for a

Basic Computation: Sample Size Suppose x has a normal distribution with s 5 1.2.

(a) Find the minimal sample size required so that for a 90% confi dence interval, the maximal margin of error is E 5 0.5.

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

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