State University requires an admission test of all its students. A simple random sample of 121 students from the University was selected to estimate the average test
score of all University students. The average (mean) for the sample was found to be
23.4 with a sample standard deviation of 3.65. (3 points each)
Construct a 95% confidence interval for the average (mean) test score of all University
students. Be sure to tell which kind of interval you have chosen
a
121
23.4
I
3.65
(b)
What does the 95% confidence interval that you calculated in (a) tell you about the average
(mean) test score of all University students?