The mean age of the employees at a large corporation is 35.2 years, and the standard...
The mean age of the employees at a large corporation is 35.2 years, and the standard deviation is 9.5 years. A random sample of 4 employees will be selected.
What are the mean and standard deviation of the sampling distribution of the sample mean for samples of size 4 ?
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The mean is 35.2, and the standard deviation is 9.5.
A
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The mean is 35.2, and the standard deviation is 9.549.54.
B
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The mean is 35.2, and the standard deviation is 9.529.52.
C
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The mean is 35.2435.24, and the standard deviation is 9.549.54.
D
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The mean is 35.2235.22, and the standard deviation is 9.529.52.
E
The distribution of the commute times for the employees at a large company has mean 22.4 minutes and standard deviation 6.8 minutes. A random sample of n employees will be selected and their commute times will be recorded.
What is true about the sampling distribution of the sample mean as n increases from 2 to 10 ?
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The mean increases, and the variance increases.
A
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The mean increases, and the variance decreases.
B
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The mean does not change, and the variance does not change.
C
-
The mean does not change, and the variance increases.
D
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The mean does not change, and the variance decreases.
E
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The mean age of the employees at a large corporation is 35.2
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