Content X w learn-us-east-1-p x 20211002_PHC x (4 unread) - enoc x > darwinian paradic x C Short Essay Ques X *Homework Help - X + X G https://bb-csuohio.blackboard.com/ultra/courses/_140669_1/cl/outline?legacyUrl=~2Fwebapps~2Fblackboard~2Fconten... G * Question Completion Status: X QUESTION 2 3 points Save Answer In a research project for investigating whether having enough sleep the night before middle school achievement test affectsl student test results, 200 boys and 200 girls participated in the study. The results for boys and girls were recorded separately in the following tables. "High" indicates had enough sleep the night before taking the exam and "Low" indicates did not have enough sleep before taking the exam. Perform a Mantel-Haenszel test. Which of the following is correct? Test results, Boys Test results, Girls Fail Pass Fail Pass Sleep Low 20 80 Low 30 70 High 15 85 High 25 75 At 5% level of significance, there is no statistically significant difference in odds ratios of passing the test whether students had enough sleep or not. O At 5% level of significance, there is statistically significant difference in odds ratios of passing the test whether students had enough sleep or not. O The estimated odds ratio of passing the test for those who had enough sleep versus not having enough sleep is higher than 1. O The estimated odds ratio of passing the test for those who had enough sleep versus not having enough sleep is less than 1. QUESTION 3 3 points Save Answer X In a research article, the authors said that they used a chi-square test for independence for testing whether there is statistically significant correlation between two categorical variables. Each of categorical variables has two categories of outcomes. So, the contingency table for crossclassifying these two variables is a 2x2 table. They reported the chi-square statstic value for this test of independence and it is 5.21. Which of the following statements is correct? The correlation between the two categorical variables is statistically significant at 5% level of significance. O The correlation between the two categorical variables is not statistically significant at 5% level of significance. The correlation between the two categorical variables is statistically significant at 1% level of significance. O The correlation between the two categorical variables is not statistically significant at 1% level of significance. Priv Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save All Answers Save and Submit Ter Type here to search O Eli W 11:13 PM 68'F Mostly cloudy 10/20/2021 73