In an independent random sample of 10 juniors and 10 seniors, the number of minutes spent on social media per day are given by the back-to-back stem-and-leaf plots.


Time Spent on Social Media
junior senior
2 11
5 1 12 3
5 4 2 13
8 14
6 15
16 6
17 25
18 36
5 19 147
0 20 1
Key: 12|5 = 125

Part A: Describe the shape of each data set. (4 points)

Part B: Wyatt analyzed the data and stated that the better measure of center for the seniors is the mean. Is Wyatt correct? Explain your reasoning. (5 points)

Part C: Wyatt decided there are no outliers in the juniors' data set. Is he correct? Justify your answer mathematically. (5 points)