Solve the Problem

question 26

Multiple Choice

Solve the problem. Round the standard score to the nearest tenth before using the z-score tables. Express your answer as
a percent rounded to hundredths of a percent.
-A study of the amount of time it takes a mechanic to rebuild the transmission for a 1992 Chevrolet Cavalier shows that the mean is 8.4 hours and the standard deviation is 1.77 hours. Assume that a random sample of 40 mechanics is selected and the mean rebuild time of the sample is computed. Assuming the rebuilding times are normally distributed, what percentage of sample means are greater than 8.0 hours?

• A)91.92%
• B)94.52%
• C)5.48%
• D)8.08%

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Definitions:

Straight-Line Depreciation

This is a method of allocating an asset's cost evenly across its useful life.

Initial Investments

The initial amount of money that is put into a project, business, or investment.

Initial Investments

The upfront capital or resources expended to start a project, acquire an asset, or establish a business.

Income Taxes

Taxes imposed by the government on the income earned by individuals and corporations.