Question

QUESTION 13 "Given the scenario below, what is the critical value? Americans typically take off sick days each year, with a standard deviation of 2 daysA researcher would like to know whether paychiatrists take off less sick days than the average American. The researcher obtains a sample of 16 psychiatrists who, on average take days of sick leave a year. Test this researchers hypothesis using an alpha level of 01.

Answer 1

13) $H_{0}: \mu = 5$

$H_{1}: \mu < 5$

At $\alpha$ = 0.01, the critical value is -z_0.01 = -2.33

The test statistic is

T- 2 = o/vn

3 - 5 2/16