A sociologist develops a test designed to measure attitudes about disabled people and gives the test to 16 randomly selected subjects. Their mean score is 71.2 with a standard deviation of 10.5. Construct the 99 percent confidence interval for the mean score of all subjects.
A) [40.26, 102.14]
B) [63.46, 78.94]
C) [60.66, 81.74]
D) [64.44, 77.96]
E) [63.21, 79.19]

Question

Quizplus · Accepted Answer

[± ] = [71.2 ± 2.947(10.5/ 4)] = [71.2 ± 7.736]
= [63.46, 78.94]

A Sociologist Develops a Test Designed to Measure Attitudes About