Concept explainers
To calculate: The
Answer to Problem 38E
The required sample size is 16065.
Explanation of Solution
Given information:
Sample size = 1785
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 one third of the current as,
Here, by quadrupling we can write the sample size as 9n.
Substitute 1785 for n in the sample size 9n and simplify.
Hence, the required sample size is 16065.
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