2. A sociologist develops a test to measure attitudes about public transportation, and 20 randomly selected subjects are given the test. Their mean score is 80 and their standard deviation is 16...

2. A sociologist develops a test to measure attitudes about public transportation, and 20

randomly selected subjects are given the test. Their mean score is 80 and their standard

deviation is 16 Construct 90% confidence interval for the mean score of all such

subjects.