method and wants to perform a hypothesis test to determine whether the mean running time has changed as a result. A. Lower-tailed B. Upper-tailed C. Two-sided QA OB O C

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A: SD = 120 hours99% = 99/100 = 0.99X = 925 hours

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A: Site1Site2Site3Site4Site5192021202519161919221516121323221514161815182318211512201616141325192417101…

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A:

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A: a=51b=78C=43d=93

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A:

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A: From the above given data the following solution is provided below

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A:

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A: YearsHeight0.90.7923.982.14.81411.414.829.725.224.26.226.81991.479.1129.45

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