Willa F (17) The Sleep Foundation recommends that school age children (6-13 years old) get between 9 and 11 hours of sleep while teenagers (14-17 years old) get between 8 and 10 hours of sleep. Suppose we take a random sample of ten school age children and ten teenagers. Their sleep times are recorded and provided below. Observation School age Teenager 7.9 6.2 2 8.4 9.2 7.9 8.1 3 4 7 8 9 5 6 9.3 9.9 10.1 10.4 10.5 11.1 8.7 9.2 9.3 9.9 10.5 10.6 10 11.1 10.7 dipe G (A vis (a) Construct back to back stem and leaf plots for hours of sleep the groups. That is, use the same stem for both groups. Display the leaves for the school age children to the left of the stem and teenagers to the right of the stem. 36 40 (b) Describe the key features of each group. (c) In a few sentences, compare and contrast the sleep distributions for school age children (6-13 years old) and teenagers (14-17 years old).

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