Question

Step 1

**Sample size:**

The minimum sample size for a desired confidence level, α with a given margin of error, *E* is given by:

Step 2

**Computing the sample size:**

Thus, it is given that the confidence level is 99%. Therefore, the significance level, α = 0.01.

From the EXCEL, using the formula, = NORM.INV(0.995,0,1), the critical value, zα/2 is 2.576.

That is, the true ...

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