Exhibit 9-7 A Random Sample of 16 Statistics Examinations from a Large

question 134

Multiple Choice

Exhibit 9-7
A random sample of 16 statistics examinations from a large population was taken. The average score in the sample was 78.6 with a variance of 64. We are interested in determining whether the average grade of the population is significantly more than 75. Assume the distribution of the population of grades is normal.
-Refer to Exhibit 9-7. The test statistic is

• A)0.45
• B)1.80
• C)3.6
• D)8

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