Solve the Problem. -A Study of the Amount of Time It Takes a It

question 85

Multiple Choice

Solve the problem.
-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 1.8 hours. If 40 mechanics are randomly selected, find the probability that their mean rebuild time exceeds 7.7 hours.

• A)0.8531
• B)0.9931
• C)0.9712
• D)0.9634

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Definitions:

Interest

The cost of borrowing money, often expressed as a percentage rate over a period of time, or the income earned from lending money.

Dividends

Money disbursed by a business to its members, principally originating from the enterprise's earnings.

Financial Intermediary

An institution that pools investors’ money and invests it on their behalf giving the investors shares of itself. Mutual funds are the primary example.

Indirect Method

A way of calculating cash flows from operations by starting with net income and adjusting for changes in non-cash accounts.