The Scores of Individual Students on the American College Testing

Multiple Choice

The scores of individual students on the American College Testing (ACT) ,a college readiness assessment,have a Normal distribution with a mean of 18.6 and a standard deviation of 6.0.At Northside High,36 seniors take the test.Assume the scores at this school have the same distribution as national scores.What is the sampling distribution of the sample mean score for a random sample of 36 students?

A) Approximately Normal,but the approximation is poor
B) Approximately Normal,and the approximation is good
C) Exactly Normal
D) Neither Normal nor non-Normal-it depends on the particular 36 students selected