Question

Yoonie is a personnel manager in a large corporation. Each month
she must review 16 of the employees. From past experience, she has
found that the reviews take her approximately four hours each to do
with a population standard deviation of 1.2 hours. Let *X*
be the random variable representing the time it takes her to
complete one review. Assume *X* is normally distributed. Let
X be the random variable representing the mean time to complete the
16 reviews. Assume that the 16 reviews represent a random set of
reviews.

Complete the distributions. (Enter exact numbers as integers,
fractions, or decimals.)

(a) *X* ~ N (___,___)

(b) X ~N (___,___)

,

Additional Materials

Answer #1

A) X ~ Normal(mean =4 , s.d.=1.2)

B) in this case X represent mean time than mean remains same but

standard deviation of mean time =S.E.(X-bar) =population s. d. /square root n=1.2/4=0.3

Hence X ~Normal(mean=4 , S. E. (X-bar=0.3) )

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Yoonie is a personnel manager in a large corporation. Each month
she must review 16 of the employees. From past experience, she has
found that the reviews take her approximately four hours each to do
with a population standard deviation of 1.2 hours. Let X
be the random variable representing the time it takes her to
complete one review. Assume X is normally distributed. Let
X be the random variable representing the mean time to
complete the 16 reviews. Assume...

Yoonie is a personnel manager in a large corporation. Each month
she must review 16 of the employees. From past experience, she has
found that the reviews take her approximately four hours each to do
with a population standard deviation of 1.2 hours. Let X
be the random variable representing the time it takes her to
complete one review. Assume X is normally distributed. Let
X be the random variable representing the mean time to complete the
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