Concept explainers
The correct answer from the options that the standard deviation of the average scores you get should be close to (a) 114, (b)
Answer to Problem 66E
The correct answer is (c).
Explanation of Solution
Given information:
Mean = 515
Standard deviation = 114
Number of students for SRS = 100
Formula used:
The standard deviation of the average
Consider that the mean be
Write:
To find the standard deviation of the average scores, use the formula
Substitute 114 for
Thus, the standard deviation of the average score is 11.4.
Hence, the correct answer is (c).
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