SCENARIO 10-5 To Test the Effectiveness of a Business School Preparation Course,8

question 21

Multiple Choice

SCENARIO 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.

-Referring to Scenario 10-5,the value of the sample mean difference is_____ if the difference scores reflect the results of the exam after the course minus the results of the exam before the course.

• A)0
• B)50
• C)68
• D)400

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