To test the effectiveness of a business school preparation course, 8 students took a general business test before and after the course. The results are in the accompanying table. What is the value of the sample mean difference if the difference scores reflect the results of the exam after the course minus the results of the exam before the course? Student Exam Score Before Course (1) Exam Score After Course (2) 1 530 670 2 690 770 3 910 1,000 4 700 710 5 450 550 6 820 870 7 820 770 8 630 610 A. 68 B. 0 C. 50 D. 400
To test the effectiveness of a business school preparation course, 8 students took a general business test before and after the course. The results are in the accompanying table. What is the value of the sample mean difference if the difference scores reflect the results of the exam after the course minus the results of the exam before the course? Student Exam Score Before Course (1) Exam Score After Course (2) 1 530 670 2 690 770 3 910 1,000 4 700 710 5 450 550 6 820 870 7 820 770 8 630 610 A. 68 B. 0 C. 50 D. 400
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.4: Collecting Data
Problem 3E
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To test the effectiveness of a business school preparation course, 8 students took a general business test before and after the course. The results are in the accompanying table. What is the value of the sample mean difference if the difference scores reflect the results of the exam after the course minus the results of the exam before the course?
Student
|
Exam Score Before Course (1)
|
Exam Score After Course (2)
|
---|---|---|
1
|
530
|
670
|
2
|
690
|
770
|
3
|
910
|
1,000
|
4
|
700
|
710
|
5
|
450
|
550
|
6
|
820
|
870
|
7
|
820
|
770
|
8
|
630
|
610
|
A.
68
0
50
400
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