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minutes To test this claim a random sample of 70 completion times under new management was taken by the analyst The sample had a mean of 15 2 minutes Can we support at the 0 01 level of significance the claim that the population mean completion time under new management is less than 15 4 minutes Assume that the population standard deviation of completion times has not changed under new management Perform a one tailed test Then complete the parts below Carry your intermediate computations to three or more decimal places and round your responses as specified below If necessary consult a list of formulas 1 91 F a State the null hypothesis Ho and the alternative hypothesis H H 0 b Determine the type of test statistic to use Choose one Y c Find the value of the test statistic Round to three or more decimal places d Find the critical value Round to three or more decimal places P Search x 7 D X 0 0 OSO O d Find the critical value Round to three or more decimal places 0 e Can we support the claim that the population mean completion time under new management is less than 15 4 minutes S 2 b Determine the type of test statistic to use Choose one c Find the value of the test statistic Round to three or more decimal places D 5 P Q DO N 2023 McGraw Hilll LLC All Rights Reserved Terms of Use Privacy Center Save For Later X OSO 020 Submit Assi O O O

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