Mathematics, 05.05.2020 05:39 evazquez
The director of a radio broadcasting company wants to determine whether the mean length of commercials on his station is equal to 24 seconds. He samples 200 commercials, and finds that the average length of these commercials is 26.3 seconds, with a standard deviation of 7.2 seconds. He uses a significance level of 5%. What is the value of the test statistic?
Answers: 3
Mathematics, 20.06.2019 18:04
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The director of a radio broadcasting company wants to determine whether the mean length of commercia...
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