Question: Using the formulas provided in your text, determine the approximate sample sizes for each of the following cases, all with precision (allowable error) of 5%:

Using the formulas provided in your text, determine the approximate sample sizes for each of the following cases, all with precision (allowable error) of ±5%:
a. Variability of 30%, confidence level of 95%
b. Variability of 60%, confidence level of 99%
c. Unknown variability, confidence level of 95%

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