Question 9 (1 point) Attention-deficit/hyperactivity disorder (ADHD) is a chronic condition that makes a patient experience inattention, hyperactivity, and impulsiveness. Suppose that in a sample of 200 boys, it is found that 25 have ADHD. In another sample of 200 girls, it is found that 12 have ADHD. Construct a 95% confidence interval about the population proportion for Pboys - Pgirls- [Source: https://www.cdc.govcbddd/adhd/data.html] O O A) [0.028, 0.102] O B) [0.009, 0.121] ( c) [0.036, 0.094] ( D) [-0.009, 0.139] O O E) [-1.895, 2.025] Previous Page Next Page Page 9 of 11In 2016, thousands of Americans became HIV positive through drug injection [Source: https://www.avert.org/professionals/hiv-around-world/western-central-europe-north-america/usa]. Suppose we have the following breakdown of patients diagnosed with HIV related to drug use. Using the sample data below, conduct a test of significance (at 5% level of significance) to verify if the proportion of HIV-positive Caucasians is greater than that of the Hispanic group. Ethnicity Sample size (n) Proportion infected through injection Caucasian (or C) 70 0.41 Hispanic (or H) 65 0.23 What are the most appropriate null and alternative hypotheses for this test? O A) Ho : PC - PH = 0 vs Ha : pc - PH # 0 O B) HO : PC - PH 2 0 vs Ha : Pc - PH 0 OD) Ho : PC - PH 0 OE) HO : PC - PH 0Question 7 (1 point) Attention-deficit/hyperactivity disorder (ADHD) is a chronic condition that makes a patient experience inattention, hyperactivity, and impulsiveness. Suppose that in a sample of 200 boys, it is found that 25 have ADHD. In another sample of 200 girls, it is found that 12 have ADHD. From your calculated confidence interval, would you say that there is a significant difference between the two proportions? [$0urce: https://www. cdc.govcbddd/adhd/data. h tml] OA) Since the confidence interval contains 0, there is a significant difference between the proportions of girls and boys who have ADHD. O B) Since the confidence interval does not contain 0, there is no significant difference between the proportions of girls and boys who have ADH D. O C) Since the confidence interval contains 0, there is no significant difference between the proportions of girls and boys who have ADHD. O D) Since the confidence interval does not contain 0, there is a significant difference between the proportions of girls and boys who have ADHD. O E) I need more information to answer this. Previous Page Next Page Page 7 0f 11