Assignment Score: 89.5% Resources Ly Give Up? Feedback Resume Attempt 5 A random sample of 871 students between the ages of 20 and 24 at a large midwestern university completed a survey including questions about their sleep quality, moods, academic performance, physical health, and psychoactive drug use. Sleep quality was measured using the Pittsburgh Sleep Quality Index (PSQI), with students scoring less than or equal to five on the index classified as optimal sleepers, those scoring a 6 or 7 classified as borderline, and those scoring over 7 classified as poor sleepers. The following table looks at the relationship between sleep quality classification and the use of over-the-counter (OTC) or prescription (Rx) stimulant medication more than once a month to help keep awake. Sleep quality on PSQI index Use of OTC/Rx meds to wake > Optimal Borderline Poor 1x/month Yes 37 53 84 No 266 186 245 To access the complete data set, click the link for your preferred software format: Excel Minitab JMP SPSS TI R Mac-TXT PC-TXT CSV CrunchIt! (a) Regarding this survey as approximately an SRS of college students, give a 95% confidence interval for the proportion of college students who use over-the-counter or prescription stimulant medication more than once a month to keep awake. Enter your answers rounded to four decimal places. The lower bound of the 95% confidence interval is: 0.1732 The upper bound of the 95% confidence interval is: 0.2263 Question Source: Moore, The Basic Practice Of Statistics, 8e | Publisher: W.H. Freeman(D Assignment Score: ( Question 14 of 20 > D Resources a Give Up? E' Feedback m JIK ' Attempts v (b) Find the conditional distributions of sleep quality for students who use over-the-counter or prescription stimulant medication more than once a month to keep awake and those who don't. Enter the values for the conditional distributions that correspond to the letters a f in the tables. Enter your answers rounded to two decimal places. Optimal Borderline Poor No 266 186 245 Conditional distribution a% b% c% Optimal Borderline Poor Yes 37 53 84 Conditional distribution d% e% f % 38.16 Incorrect 26.69 Incorrect 35.15 Incorrect % % % Question Source: Moore, The Basic Practice Of Statistics, 8e | Pu blishen W.H. Freeman (D AssignmentScore: [:l Resources L1 Give Up? E' Feedback m JIK ( Question 14 of 20 > ' Attempts v = 21.26 % Incorrect e = 30.46 % Incorrect f = 48.28 % Incorrect Based on these conditional distributions, select the correct description of the overall relationship between students who use and don't use medications to keep awake and their sleep quality. 0 It appears that those who use OTC medications are more likely to have optimal sleep and more likely to have poor sleep than those who do not use these medications. Q It appears that those who use OTC medications are less likely to have optimal sleep and less likely to have poor sleep than those who do not use these medications. Q It appears that those who use OTC medications are about as likely to have optimal sleep and more likely to have poor sleep than those who do not use these medications. o It appears that those who use OTC medications are less likely to have optimal sleep and more likely to have poor sleep than those who do not use these medications. Question Source: Moore, The Basic Practice Of Statistics, lie | Publisher. W.H. Freeman