student 1 3 4 5 7 8 before 15 14 17 17 19 14 13 16 , after 9 9. 11 10 19 10 14 10 It has been determined that the more students work in the middle of the semester for a mid-level macroeconomics course, the more they reduce their study time in the following semester. 8 students who successfully passed the midterm exam were selected randomly and their performances before and after the exam were compared. The results are given in Table. Suppose the performance differences are normal is distributed. a) In order to understand whether there is a difference between the pre-exam and post-exam study times, form the null hypothesis and its alternative. b) Perform the tests at the significance levels a = 0.10, a 0.05 and a = 0.01. Does the population mean change according to the working period? Decide.

student 1 3 4 5 7 8 before 15 14 17 17 19 14 13 16 , after 9 9. 11 10 19 10 14 10 It has been determined that the more students work in the middle of the semester for a mid-level macroeconomics course, the more they reduce their study time in the following semester. 8 students who successfully passed the midterm exam were selected randomly and their performances before and after the exam were compared. The results are given in Table. Suppose the performance differences are normal is distributed. a) In order to understand whether there is a difference between the pre-exam and post-exam study times, form the null hypothesis and its alternative. b) Perform the tests at the significance levels a = 0.10, a 0.05 and a = 0.01. Does the population mean change according to the working period? Decide.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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