what is the critical value for testing at the 5% level of significance whether the business school preparation course is effective in improving exam scores?

what is the critical value for testing at the 5% level of significance whether the business school preparation course is effective in improving exam scores?

  1. TABLE 10-5

    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 given below.

Student

Exam score

Before Course (1)

Exam Score

After course (2)

1

530

670

2

690

770

3

910

1000

4

700

710

5

450

550

6

820

870

7

820

770

8

630

610

Referring to Table 10-5, what is the critical value for testing at the 5% level
of significance whether the business school preparation course is effective in improving
exam scores?


2.365


2.145


1.761


1.895


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