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

---

Definitions:

Researcher

An individual engaged in systematic investigation to establish facts or principles or to collect information on a subject.

HMO Outcome

The results or effects of health maintenance organization (HMO) policies on healthcare quality, costs, and patient satisfaction.

Risk-neutral

A description of an investor's or decision maker's attitude towards risk in which they are indifferent between different prospects with the same expected return, regardless of the associated risk.

Megalopolis

A large, heavily populated urban complex that includes several cities and their suburban peripheries.