(Solved): The grade point average of 4 randomly selected college students is recorded at the end of the fall ...

The grade point average of 4 randomly selected college students is recorded at the end of the fall and spring semesters of their senior year, as follows: Student 1 2 3 4 Fall 2.3 1.7 1.7 1.3 Spring 1.6 1.2 1.7 0.90 Construct a 80% confidence interval for the mean difference in GPA Lower bound = (use two decimal places). Upper bound (use two decimal places) =