Exhibit 8-3
a Random Sample of 81 Automobiles Traveling on a Section

question 90

Multiple Choice

Exhibit 8-3
A random sample of 81 automobiles traveling on a section of an interstate showed an average speed of 60 mph. The distribution of speeds of all cars on this section of highway is normally distributed, with a standard deviation of 13.5 mph.
-Refer to Exhibit 8-3. The 86.9% confidence interval for $\mu$ is

• A)46.500 to 73.500
• B)57.735 to 62.265
• C)59.131 to 60.869
• D)50 to 70

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Definitions:

Long-Term Investments

Long-Term Investments are assets that a company intends to hold for more than one fiscal year, often including stocks, bonds, or real estate.

Property, Plant, and Equipment

Long-term assets used in the production of goods and services, such as buildings, machinery, and vehicles.

Current Liability

A company's debts or obligations that are due to be paid to creditors within one year.

Coming Year

The subsequent year or the next twelve months.