A Study of the Amount of Time It Takes a Mechanic

question 96

Multiple Choice

A study of the amount of time it takes a mechanic to rebuild the transmission for a 2005 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) 0.9712
• B) 0.8531
• C) 0.9634
• D) 0.9931

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Definitions:

Death

The cessation of all biological functions that sustain a living organism, marking the end of life.

Divine Plan

A belief in a predetermined course of events controlled or envisioned by a supernatural power.

Stoics

Adherents of Stoicism, an ancient Greek philosophy that teaches the development of self-control and fortitude as a means of overcoming destructive emotions.

Preconceived

Ideas, opinions, or judgments formed in advance without adequate evidence or experience.