For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round answer to 2 decimal places. (a) The sample has size 16, and it is from a normally distributed population with a known standard deviation of 77.  z=    t=  or it is unclear which test statistic to use. (b) The sample has size 18, and it is from a normally distributed population with an unknown standard deviation. z=     t=   or it is unclear which test statistic to use.

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Chapter1: Starting With Matlab
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We want to conduct a hypothesis test of the claim that the population mean score on a nationwide examination in anthropology is different from 481. So, we choose a random sample of exam scores. The sample has a mean of 488 and a standard deviation of 75.

 For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round answer to 2 decimal places.

(a) The sample has size 16, and it is from a normally distributed population with a known standard deviation of 77.  z=    t=  or it is unclear which test statistic to use.

(b) The sample has size 18, and it is from a normally distributed population with an unknown standard deviation. z=     t=   or it is unclear which test statistic to use.

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