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 fewer 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 .01. Given the scenario, what is the appropriate test to use?

(which one?)

Binomial Test

paired samples t-test

Z-test

Single Sample t-test