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7.26 Number of friends on Facebook Facebook recently examined all active Facebook users (more than 10% of the global population) and determined that the average user has 190 friends. This distribution takes only integer values, so it is certainly not Normal. It is also highly skewed to the right, with a median of 100 friends.8 Consider the following SRS of n : 30 Facebook users from your large university. 594 60 417 120 132 176 516 319 734 8 31 325 52 63 537 27 368 11 12 190 85 165 288 65 57 81 257 24 297 148 (a) Are these data also heavily skewed? Use graphical methods to examine the distribution. Write a short summary of your ndings. (b) Do you think it is appropriate to use the t methods of this section to compute a 95% condence interval for the mean number of friends that Facebook users at your large university have? Explain Why or why not. (c) Compute the sample mean and standard deviation, the standard error of the mean, and the margin of error for 95 % condence. ((1) Report the 95% condence interval for u, the average number of friends for Facebook users at your large university