Q1) A survey of CPAs across the United States found that average net income for sole proprietor CPAs is $74,914. A research firm wants to test this figure by taking a random sample of 112 sole proprietor accountants in the United States to determine whether the net income has changed over the period of years. The sample responses produce an average of $78695. Assume the population standard deviation of net incomes for sole proprietor CPAs is $14,530. Test the claim by using test of hypothesis. Use =0.05.

a)State your null and alternate hypothesis

b)What is your Z value from the test statistics?

c)What is the critical value of Z from table?

d)Whether you accept or reject the Null hypothesis?