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

question 66

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. At 95% confidence, it can be concluded that the average grade of the population

• A)is not significantly greater than 75
• B)is significantly greater than 75
• C)is not significantly greater than 78.6
• D)is significantly greater than 78.6

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The transfer or delegation of power to a lower level, especially by a central government to local or regional administrations.

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