Teaching Assistants' Stipends A random sample of stipends of teaching assistants in economics is listed. Is there sufficient evidence at the a 0.05 level to conclude that the average stipend differs from $15,000? The stipends listed (in dollars) are for the academic year. Assume that the population is approximately normally distributed. 12.283 13,185 13,419 14,356 12,000 17,604 11,981 14,000 14,000 Send data to Excel Part 1 of S (a) State the hypotheses and identify the claim. HP This hypothesis test is a one-tailed Part 2 of 5 not claim b not claim test. (b) Find the critical value(s). Round the answer(s) to at least three decimal places. If there is more than one critical value, separate them with commas. Critical value(s): Part 3 of 5 (c) Compute the test value. Always round score values to at least three decimal places. Part 4 of 5 (d) Make the decision. Do not reject the null hypothesis. Part: 4/5 Part 5 of 5 (c) Summarize the results. There is enough evidence to support the claim that the mean stipend for teaching assistants in economics differs from $15,000 G