' chrome File Edit View History Bookmarks Profiles Tab Window 1' i'l Course: Ace 220 (601) Fall 20 X '1' ST 350 Homework #11 Fall 20 x G this exoelfile D1 Basketball gr. x I u Course Hero X l 8 Part A. Do The Warm Miami Te x I + 6 9 C' i webassign.net/web/Student/AssignmentResponses/submit?dep=280920948dags=autosave#question2902825_2 i} I o Attention decit hyperactivity disorder (ADHD) in young children presents signicant challenges to the children, their parents, and their classroom teachers. Stimulant medication can effectively treat 60% to 70% of youth with ADHD. Yet many parents seek alternative therapies, and Hypericum perforatum (St John's wort) is 1 of the top 3 alternative therapies used. In a recent study in the Journal of the American Medical Association, Hypericum perforatum (St John's Wort) for Attention-Decit/Hyperactivity Disorder in Children and Adolescents, 2008;299(22}:2633-2641, the authors conducted a randomized, double-blind, placebo-controlled trial to determine the efcacy and safety of St. John's wort for the treatment of ADHD in children. After careful pre-screening, 54 children were randomly assigned to two treatment groups; 27 children were assigned to receive a placebo treatment and 27 children were assigned to receive a treatment with St. John's wort. A measure of "inattentiveness" was used to evaluate the effect of the treatments. At the beginning of the experiment, the placebo group and treatment group had the same inattentiveness score. After 4 weeks of the experiment, the data in the table below were obtained (a lower inattentiveness score indicates a longer attention span): ST. JOHN'S WORT vs PLACEBO STUDY Question 1. Calculate a 95% condence interval for the difference [41 - [42, where [41 is the mean inattentiveness score after 4 weeks for all ADHD children who receive a placebo, and 142 is the mean inattentiveness score after 4 weeks for all ADHD children who receive st. John's wort. lower bound of interval upper bound of interval Question 2.Select the choice below that correctly interprets the interval in question 1. O The probability that #1 - #2 is in the interval is 0.95. O The inattentiveness score of 95% of the children studied changed by an amount in the interval. 0 I am 95% condent that the average change of the inattentiveness score for children in this study is in the interval. 0 I am 95% condent that if a child with ADHD is given st John's wort, the child's inattentiveness score will change by an amount in the interval. 0 I am 95% condent that the interval in question 1 captures the true mean difference [41 - #2; based on this interval it does not appear that St. John's wort is an effective treatment for ADHD. 0 If St. John's wort is tested on another sample of ADHD children, there is a 95% chance that their average inattentiveness score will change by an amount in the interval