Use Hypothesis Testing to answer the following questions. Show your work on each problem by following these five steps: a ) State the hypotheses and identify the claim. b ) Find the critical value. C) Find the test value. d) Make the decision to reject or not reject the null hypothesis. e) Summarize the results. A random sample of stipends of teaching assistants in economics is listed below. Is there sufficient evidence at the alpha equal to 0.05 level to conclude that the average stipend differs from $15,000? The stipends listed (in dollars) are for the academic year. 14,000 13,419 16,338 18,000 14,000 15,000 12,000 11,981 14,356