The Sampling Distribution of the Sample Mean

Statistics
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A population has mean 1,542 and standard deviation 246.
Find the mean and standard deviation of X− for samples of size 100.

Mar 10th, 2015

The sample mean is the population mean: 1542.

The standard deviation of the sample mean (called the "standard error") is 

population standard deviation / sqrt(sample size)

= 246 / sqrt(100)

= 24.6

Mar 10th, 2015

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