Question: 11.48 With reference to Exercise 11.8 on page 419, construct (a) a 95% confidence interval for the average course grade of students who make a

11.48 With reference to Exercise 11.8 on page 419, construct

(a) a 95% confidence interval for the average course grade of students who make a 35 on the placement test;

(b) a 95% prediction interval for the course grade of a student who made a 35 on the placement test.

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