6. I wish to find a 95% confidence interval for the mean number of times men change channels with a remote control during a commercial. Based on a preliminary study, I estimate s = 15. How many commercials’ worth of data do I need to have a margin of error no more than 3? a. 10 b. 97 c. 96

6. I wish to find a 95% confidence interval for the mean number of times men change channels with a remote control during a commercial. Based on a preliminary study, I estimate s = 15. How many commercials’ worth of data do I need to have a margin of error no more than 3?
a. 10
b. 97
c. 96

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