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:

Successful Aging

A concept involving maintaining physical health, cognitive function, and social engagement in older adulthood.

Disengagement Theory

A theory proposing that aging individuals and society gradually withdraw from each other, to the mutual benefit of both.

Current Trends

The general direction in which something is developing or changing, often used to describe shifts in markets, technology, or social behaviors.

Selective Optimization

A strategy that involves focusing on and improving one's strengths while compensating for weaknesses, often used in the context of aging and development.