Provide an Appropriate Response $= 155 \mathrm { lb }$ , Standard Deviation

Provide an appropriate response.
-Weights of adults in a certain age group are normally distributed. Which of the following are plausible values for the mean and standard deviation?

A) Mean $= 155 \mathrm { lb }$ , standard deviation $= 12 \mathrm { lb }$
B) Mean $= 155 \mathrm { lb }$ , standard deviation $= - 20 \mathrm { lb }$
C) Mean $= 160 \mathrm { lb }$ , standard deviation $= 25 \mathrm { lb }$
D) Mean $= 158 \mathrm { lb }$ , standard deviation $= 5 \mathrm { lb }$

Correct Answer:

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