Starting salary fro employees in the state is less than $30,000 per year. test hypothesis she collect a simple random sample of 100 starting clerical salaries and found that the sample mean is $29,750.
a. state the null and alternative hypothesis.
b. population standard deviation is $2500 and level of test is 0.05 what is the critical value?
c. Refer to b answer, what conclusion shold be reach with respect to the null hypothesis?
d. refer to c answer which of the two statistical errors might have been made in this case? Explain.