State the null and alternative hypothesis. population, Ask an Expert

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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

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