1 boys' screen time girls' screen time A doctor claims that teenage boys get more screen time than teenage girls. A study N 5 3 asked 15 teenage boys, and 18 teenage girls, how many hours of screen time they 4 4 get per day, on average. The results are to the left. 6 5 UT 4 What is the null hypothesis to examine the claim? Ho: 4 3 5 4 What is the alternative hypothesis to examine the claim? H1: 3 2 Which of the two hypotheses corresponds to the claim? 1 w w 10 2.1 What is the sample mean of boys' screen time? 11 4 12 3 2.2 What is the sample mean of girls' screen time? 13 N 14 3 2.3 What is the sample standard deviation of boys' screen time? 15 6 5 16 4 4 2.4 What is the sample standard deviation of girls' screen time? 17 5 18 4 2.5 What is the combined standard error for the difference between the two sample 19 3 means? 20 2.6 What is the bound of the critical region, for a = 0.10 ? 21 22 2.7 What is the test static? 23 24 2.8 Is the null hypothesis rejected? 25 26 2.9 Is the claim supported? 27