Sampling Distribution. To commemorate Facebook’s 10-year milestone, Pew Research reported several facts about Facebook obtained from its...
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Sampling Distribution. To commemorate Facebook’s 10-yearmilestone, Pew Research reported several facts about Facebookobtained from its Internet Project survey. One was that the averageadult user of Facebook has 338 friends. This populationdistribution takes only integer values, so it is certainly notNormal. It is also highly skewed to the right, with a reportedmedian of 200 friends.
Suppose that ? = 380 and you take an SRS of 80 adult Facebookusers.
a. For your sample, what are the mean and standard deviation of? (xbar), the mean number of friends per adult user?
b. Use the central limit theorem to find the probability thatthe average number of friends for 80 Facebook users is greater than350.
Sampling Distribution. To commemorate Facebook’s 10-yearmilestone, Pew Research reported several facts about Facebookobtained from its Internet Project survey. One was that the averageadult user of Facebook has 338 friends. This populationdistribution takes only integer values, so it is certainly notNormal. It is also highly skewed to the right, with a reportedmedian of 200 friends.
Suppose that ? = 380 and you take an SRS of 80 adult Facebookusers.
a. For your sample, what are the mean and standard deviation of? (xbar), the mean number of friends per adult user?
b. Use the central limit theorem to find the probability thatthe average number of friends for 80 Facebook users is greater than350.
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