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

question 12

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 8.7 hours.

• A)0.1285
• B)0.1469
• C)0.1946
• D)0.1346

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Definitions:

Scenario 1-3

A hypothetical or real situation used to illustrate a particular case or outcome, typically numbered for organization.

Marginal Cost

Marginal cost is the change in total cost that arises when the quantity produced is incremented by one unit; it's the cost of producing one more unit of a good.

Opportunity Cost

The loss of potential gain from other alternatives when one option is chosen.