Concept explainers
To calculate: The
Answer to Problem 37E
The required sample size is 4048.
Explanation of Solution
Given information:
Sample size = 1012
Proportion of condition which is met = 10%
Formula used:
The mean of the sampling distribution of
The standard deviation of the sampling distribution of
Here, the formula of standard deviation can be written if the standard deviation needs to become half the current as,
Here, by quadrupling we can write the sample size as 4n.
Substitute 1012 for n in the sample size 4n and simplify.
Hence, the required sample size is 4048.
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