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# Patrons at a local batting cage complain that a pitching machine set to throw 80 mph is throwing too ...

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Patrons at a local batting cage complain that a pitching machine set to throw 80 mph is throwing too slowly. A random sample of 29 pitches from the machine yields an average speed of 79.25 mph with a standard deviation of 4.22 mph. Perform a hypothesis test to see if the average speed of this machine is less than 80 mph. Select the appropriate critical value (CV), test statistic (TS), and decision, and listH0. (Useα= 0.01.)

CV = –2.4671; TS = –0.96; fail to rejectH0t: the machine throws at less than 80 mph

CV = –1.3125; TS = –0.82; fail to rejectH0: the machine throws at less than 80 mph

CV = –2.2671; TS = –0.18; fail to rejectH0: the machine throws at less than 80 mph

CV = –2.4671; TS = –0.96; fail to rejectH0: the machine throws at 80 mph

Textbook

## Introductory Statistics: A Problem-Solving Approach

Edition: 3rd
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apontea13apontea13
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