A Study of the Amount of Time It Takes a Mechanic

question 46

Multiple Choice

A study of the amount of time it takes a mechanic to rebuild the transmission for a 2010 Chevrolet Colorado 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 is less
Than 8.9 hours.

• A) 0.9589
• B) 0.4276
• C) 0.9608
• D) 0.9756

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Definitions:

Earth's Orbit

The path that the Earth follows around the Sun, which is elliptical in shape and takes approximately 365.25 days to complete one full cycle.

Year-round

Occurring, effective, employed, staying, or open all year; not restricted to or by particular seasons.

Rock Cycle

A conceptual framework presenting possible paths and processes to which a rock can be subjected as it moves from one place to another and between different depths within Earth.

James Hutton

Often considered the father of modern geology, he theorized that the Earth was shaped by ongoing processes over a vast expanse of time.