Mathematics, 12.06.2020 18:57 joynerjaila

Historically, the average time it takes KIm to swim the 200 meter butterfly is 148.4 seconds. Kim would like to know if her average time has changed. She records her time on 50 randomly selected occasions and computes the mean to be 147.8 with a standard deviation of 2.3 seconds. Determine the null and alternative hypothesis, and your conclusion at the level of significance .01. Group of answer choices

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Historically, the average time it takes KIm to swim the 200 meter butterfly is 148.4 seconds. Kim wo...

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