TABLE 10-5 To Test the Effectiveness of a Business School Preparation Course

question 153

Multiple Choice

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.
Exam Score Exam Score
Student Before Course (1) 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
-Referring to Table 10-5, the number of degrees of freedom is

• A) 14.
• B) 13.
• C) 8.
• D) 7.

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Definitions:

Alternative Hypothesis

A statistical hypothesis that specifies a population parameter's value is different from the value stated in the null hypothesis.

Pooled Estimate

A method used to combine estimates from different groups or studies to obtain a common estimate when the groups are considered homogeneous.

Water Consumption

The amount of water utilized by individuals, households, or groups for drinking, sanitation, cooking, and other purposes.

Confidence Interval

A span of numerical outcomes obtained from statistical analysis of a sample, which probably includes the value of a parameter from the entire population that is not known.