A Sociologist Develops a Test to Measure Attitudes About Public

Multiple Choice

A sociologist develops a test to measure attitudes about public transportation,and 100 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) (64.2,88.2)
B) (72.0,80.4)
C) (67.7,84.7)
D) (64.2,83.2)
E) (74.6,77.8)