Question

Based on the question what is the answer to number one

In what follows use any of the following tests/procedures: Regression, confidence intervals, one-sided t-test, or two-sided t-test. All the procedures should be done with 5% P-value or 95% confidence interval The empirical literature suggests that class absenteeism undermines students' academic performance and that an enforced mandatory attendance policy may be beneficial Open Attendance data. Using data on 90 second-year students enrolled in a Statistics course, test students who are assiduous in attending lectures have higher final grades than students who are usually absent. 1. What test/procedure did you perform? (5 points) a. One-sided t-test Ob. Two-sided t-test c. Regression d. Confidence interval 2. What is the P-value/margin of error? (5 points) a. 0.005589 b. 0.02794 0.05589 d. 0.002794 3. What is the Statistical interpretation? (5 points) a. The P-value is smaller than 0.5 thus we are confident to say that assiduous students have higher final grades. b. The p-value is greater than 5% thus the answer is inconclusive c. The P-value is much smaller than 5% thus we are very certain that the slopes not zero. d. None of these 4. What is the conclusion? (5 points) albert a. The test is inconclusive and more data is needed b. We are confident that regular attending students have higher final grades tan absence students c. We cannot be confident that students who are assiduous in attending lectures have higher final grades than students who are d. Since the test is inconclusive the conclusion is inconclusive as well None of the

Answer 1

Here, students who are absent are compared to the students who are present based on their marks, and the term higher than is used, which indicates greater than inequality ( > ) in alternate hypothesis.

Hence the test is t one tailed test