Statistics - what is the probability that the sample mean is between
Question # 00242410
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Updated on: 04/10/2016 03:38 AM Due on: 05/10/2016
According to a mashable.com post, time spent on Tumblr, a microblogging platform and social networking website, has a mean of 14 minutes per visit. (Source: on.mash.to/175wfE.) Assume that time spent on Tumblr per visit is normally distributed and that the standard deviation is 4 minutes. If you select a random sample of 25 visits,
- a. what is the probability that the sample mean is between 13.6 and 14.4 minutes?
- b. What is the probability that the sample mean is between 13 and 14 minutes?
- c. If you select a random sample of 100 visits, what is the probability that the sample mean is between 13.6 and 14.4 minutes?
- d. Explain the difference in the results of (a) and (c).
* Must give detailed answers for each, like ur teaching a class, also, results can be in Minitab
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Solution: Statistics - what is the probability that the sample mean is between