Students in a large lecture class want to know who has, on average, more Facebook friends, male or female students. The data for the students are displayed in the provided dotplots and summary statistics are available in the provided table. M O -40.62 to 166.22 O -38.75 to 164.35 O -33.95 to 159.55 O -22.43 to 148.03 0 300 Gender n Male Female X 68 678.9 91 616.1 1J S 317.6 330.6 lu : 600 900 1200 1500 1800 2100 Number of Facebook Friends Construct a 95% confidence interval for the difference in mean number of Facebook friends for male and female students at this university. Use two decimal places in your margin of error.

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