Question: Given the scenario below, what is the critical value? Americans typically take off 5 sick days each year, with a standard deviation of 2 days.

Given the scenario below, what is the critical value? Americans typically take off 5 sick days each year, with a standard deviation of 2 days. A researcher would like to know whether psychiatrists take off less sick days than the average American. The researcher obtains a sample of 16 psychiatrists who, on average, take 3 days of sick leave a year. Test this researcher s hypothesis using an alpha level of 0.01.

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