The author surveyed the students in one of his statistics classes, asking how many Facebook friends they have. Here are some of their randomly selected responses:

a. Compute the mean and the median. Compare the two results.
b. Construct a frequency histogram. Begin with lower class limit 0 friends and class width 500 friends. Explain how its shape ties in with the results you found in part (a).
c. To find the 10% trimmed mean, we first list the observations from smallest to largest. Then we remove the bottom 10% of the observations and the top 10% of the observations. Finally, we compute the mean of the remaining observations. Find the 10% trimmed mean for the Facebook friend data.
d. Compare the 10% trimmed mean and the mean that you found in part (a).
e. Which is more resistant to outliers, the mean or the trimmed mean? Explain.

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