A survey of CPAs across the United States found that he average net income for sole proprietor CPAs is $75914. An accounting researcher wants to test this amount figure by taking a random sample of...

A survey of CPAs across the United States found that he average net income for sole proprietor CPAs is $75914. An accounting researcher wants to test this amount figure by taking a random sample of 100 with an average income of $76695 sole proprietor accountants in the Unitedstates to determine whether the net income figure changed. Assume the population standard deviation of net incomes of sole proprietor CPAs is $12,530. Establish appropriate hypothesis and using appropriate test determine the relevance of the hypothesis followed by appropriate business decision.

Please explain the answer with proper steps.