UFCxKING121
New member
- Joined
- Apr 5, 2015
- Messages
- 2
I got the first part, but am not sure about the other 3 pieces of the question.
Facebook provides a variety of statistics on their Web site that detail the growth and popularity of the site.4 One such statistic is that the average user has 130 friends. This distribution only takes integer values, so it is certainly not Normal. We’ll also assume it is skewed to the right with a standard deviation σ = 85. Consider an SRS of 30 Facebook users.
(b) What are the mean and standard deviation of the mean number of friends per user?
(c) Use the central limit theorem to find the probability that the average number of friends in 30 Facebook users is greater than 140.
(d) Now assume a simple random sample of 15 was taken from the population. What is the probability that the average number of friends in this sample is greater than 140?
Facebook provides a variety of statistics on their Web site that detail the growth and popularity of the site.4 One such statistic is that the average user has 130 friends. This distribution only takes integer values, so it is certainly not Normal. We’ll also assume it is skewed to the right with a standard deviation σ = 85. Consider an SRS of 30 Facebook users.
(b) What are the mean and standard deviation of the mean number of friends per user?
(c) Use the central limit theorem to find the probability that the average number of friends in 30 Facebook users is greater than 140.
(d) Now assume a simple random sample of 15 was taken from the population. What is the probability that the average number of friends in this sample is greater than 140?