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ACT Scores A survey of 1000 students nationwide showed a mean ACT score of 21.4 ....

ACT Scores A survey of 1000 students nationwide showed a mean ACT score of 21.4 . A survey of 500 Washington DC scores showed a mean of 21.3. If the population standard deviation in each case is 3 , can we conclude the national average is greater than the Washington DC average? Use a= 0.01and use u1 for the nationwide mean ACT score.

Part 2 of 5

(b) Find the critical value(s). Round the answer(s) to at least two decimal places. If there is more than one critical value, separate them with commas. Critical value(s):

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