QUESTION:

ACT Scores A survey of 1000 students nationwide showed a mean ACT score of 21.4. A survey of 500 Alaska scores showed a mean of 21.0. If the population standard deviaijon in each case is 3, can we conclude the national average is greater than the Alaska average? Use a: 0.05 and use '11 for the nationwide mean ACT score. (a) State the hypotheses and identify the claim. Ho=Cl at. m.- n=u HID ..1 \"I (b) Find the critical value(s). Round le answer(s} to at least two decimal places. If mere is more than one critical value, separate them with commas. Critical value(s): [:1 Part 3 of 5 (c) Compute the test value. Always round z score values to at least two decimal places. Z : Part: 3 / 5 Part 4 of 5 (d) Make the decision. (Choose one) v the null hypothesis. X 5 Part: 4 / 5 Part 5 of 5 (e) Summarize the results. There (Choose one) v enough evidence to support the claim that Alaska is below the national average