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# A sample of size n is selected at random from an

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8. A sample of size  n   is selected at random from an infinite population. As   n   increases,  which of the following statements is true? a. The population standard deviation decreases b. The standard error of the sample mean decreases c. The population standard deviation increases d. The standard error of the sample mean increases 9. Consider a population with a mean of 160 and a standard deviation of 25. A random  sample of size 64 is taken from this population. The standard deviation of the sample  mean equals: 10. If all possible samples of size  n  are drawn from an infinite population with a mean of 15  and a standard deviation of 5, then the standard error of the sample mean equals 1.0 only  for samples of size 11. A population that consists of 500 observations has a mean of 40 and a standard deviation  of 15. A sample of size 100 is taken at random from this population. The standard error  of the sample mean equals: 2

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• Fall '11
• Johnson

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