Concept explainers
The correct answer from the options that decreasing the
Answer to Problem 45E
The correct answer is (b).
Explanation of Solution
Given information:
Size of the random sample,
Proportion of Division I athletes who think that these drugs are a problem
Formula used:
The standard deviation of the sampling distribution of
Consider that proportion of Division I athletes who think that these drugs are a problem be p and the sample size be n.
Rewrite it as:
And,
Know that 375 is half of the sample size 750.
So, if the sample size is decreased to 375 then the we can write the sample size as
Know that the standard deviation of the sampling distribution of
Write the standard deviation of the sampling distribution for the sample size 375 as,
This means the standard deviation is multiplied by
Hence, the correct answer is (b).
Chapter 7 Solutions
The Practice of Statistics for AP - 4th Edition
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