Concept explainers
To find: The
Answer to Problem 4PT
The sample size is 664..
Explanation of Solution
Given:
Margin of error ( E ) = 5% = 0.05
Confidence level = 99%
Formula used:
The formula to compute the sample size is:
Calculation:
From the standard normal table, the z-score at 99% confidence level is 2.576.
Consider, sample proportion to be 0.05.
The sample size is calculated as:
Here, the smallest sample size is required. Thus, the minimum sample size is 650.
Hence, the correct option is (c).
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