A Sociologist Develops a Test to Measure Attitudes About Public

A sociologist develops a test to measure attitudes about public transportation,and 27 randomly selected subjects are given the test.Their mean score is 76.2 and their standard deviation is 21.4.Construct the 95% confidence interval for the mean score of all such subjects.

A) (64.2,83.2)
B) (67.7,84.7)
C) (64.2,88.2)
D) (74.6,77.8)
E) (69.2,83.2)

Correct Answer:

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