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)

Question

Quizplus · Accepted Answer

The Answer of 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)

A Sociologist Develops a Test to Measure Attitudes About Public