2. In a random sample of 91 college students, the average number of Discord messages handled in one day is 216. The 95% confidence interval for the mean number of messages handled by students daily is given as 210 to 222. a. What is the population standard deviation? b. If the number of samples were doubled, what would be the new confidence interval (keeping the same confidence level?)

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2. In a random sample of 91 college students, the average number of Discord messages handled in
one day is 216. The 95% confidence interval for the mean number of messages handled by students
daily is given as 210 to 222.
a. What is the population standard deviation?
b. If the number of samples were doubled, what would be the new confidence interval (keeping
the same confidence level?)
Transcribed Image Text:2. In a random sample of 91 college students, the average number of Discord messages handled in one day is 216. The 95% confidence interval for the mean number of messages handled by students daily is given as 210 to 222. a. What is the population standard deviation? b. If the number of samples were doubled, what would be the new confidence interval (keeping the same confidence level?)
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