Mathematics, 28.02.2020 01:19, jocelynmarquillo1

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The standard deviation of a simple random sample of 40 calling times on a pay phone is found to be 2.6 minutes. Find the statistic to test a claim that the standard deviation of all phone calls on a pay phone is less than 2.9 minutes. Use a 0.05 significance level.
a. 32.152
b. 31.348
c. 48.519
d. 34.966

Answers: 2

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The standard deviation of a simple random sample of 40 calling...