Find the mean and standard deviation of the sample mean x-bar
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Find the mean and standard deviation of the sample mean x-bar

[From: ] [author: ] [Date: 11-12-10] [Hit: ]
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The national weather service keeps records of rainfall in valleys. records indicate that in a certain valley, the annual rainfall has a mean of 85 inches and a standard deviation of 14 inches. Suppose the rainfalls are sampled during randomly picked years and x-bar is the mean amount of rain in these years. for samples of size 49, determine the mean and standard deviation of x-bar.

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mean 85

SD = 14/sqrt(49) = 2
1
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