question archive A statistical analysis was made of the midterm and final scores in a large course, with the following results: average midterm score = 50, SD = 25, average final score = 55, SD = 15, r= 0
A statistical analysis was made of the midterm and final scores in a large course, with the following results: average midterm score = 50, SD = 25, average final score = 55, SD = 15, r= 0
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A statistical analysis was made of the midterm and final scores in a large course, with the following results: average midterm score = 50, SD = 25, average final score = 55, SD = 15, r= 0.60... the scatter diagram was football-shaped. For each student, the final score was predicted from the midterm score using the regression line.
(a) for about 1/3 of the students, the prediction for the final score was off by more than _____ points.
6,
9,
12,
15,
25.
(b) predict the finals core for a student whose midterm score was 80.
(c) this prediction is likely to be off by _____ points or so.
6,
9,
12,
15,
25.
