R Quizzes - QMS210 011 - Applie X Course Hero X + > C a courses.ryerson.ca/d21/Ims/quizzing/user/attempt/quiz_start_frame_auto.d21?ou=682825&isprv=&drc=0&qi=332796&cfql=0&dnb=0&fromQB=0 F22 - QMS210 - Test 2 X Time Limit: 1:30:00 Time Left:1:21:36 Mohammad Fawaz Iqbal: Attempt 1 Page 1: Use this scenario for the following 4 questions 1 2 3 A problem with a telephone line that prevents a customer from receiving or making calls is upsetting to both the customer and the telephone company. Samples of 4 5 6 problems reported to two different offices of a telephone company and the waiting times (in minutes) to fix these problems from the customers' lines were analyzed using SPSS and the following reports were generated 8 9 10 11 12 Group Statistics Std. Offices N Mean Std. Error Mean Deviation 13 14 15 Waiting time (in mins) to Office 1 20 2.2315 1.65951 0.37108 fix problems Office 2 20 1.9730 1.90102 0.42508 16 17 BT 19 20 21 Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means 22 23 24 Sig. (2- Sig. t df tailed) Equal variancesR Quizzes - QMS210 011 - Applie X Course Hero X + > C a courses.ryerson.ca/d21/Ims/quizzing/user/attempt/quiz_start_frame_auto.d21?ou=682825&isprv=&drc=0&qi=332796&cfql=0&dnb=0&fromQB=0 F22 - QMS210 - Test 2 X Time Limit: 1:30:00 Time Left:1:21:26 Mohammad Fawaz Iqbal: Attempt 1 Page 1: Offices Std. N Mean Std. Error Mean Deviation 1 2 3 Waiting time (in mins) to Office 1 20 2.2315 1.65951 0.37108 fix problems Office 2 20 1.9730 1.90102 0.42508 4 5 6 Independent Samples Test 8 9 Levene's Test for t-test for Equality of Means Equality of Variances 10 11 12 F Sig. (2- Sig. t df tailed) 13 14 15 Equal variances Waiting time (in 0.172 0.681 0.458 38 0.649 assumed mins) to fix Equal variances not 16 17 BT problems 0.458 37.319 0.650 assumed 19 20 21 Question 15 (1 point) 22 23 24 At a = 0. 05 level of significance, is the assumption of equal variances for the population of waiting times to fix problems for Office 1 and Office 2 violated? 581R Quizzes - QMS210 011 - Applie X Course Hero X + > C a courses.ryerson.ca/d21/Ims/quizzing/user/attempt/quiz_start_frame_auto.d2|?ou=682825&isprv=&drc=0&qi=332796&cfql=0&dnb=0&fromQB=0 F22 - QMS210 - Test 2 X Time Limit: 1:30:00 Time Left:1:21:15 Mohammad Fawaz Iqbal: Attempt 1 Page 1: At a = 0. 05 level of significance, is the assumption of equal variances for the 1 2 3 population of waiting times to fix problems for Office 1 and Office 2 violated? 4 5 6 It is violated because the Levine's Test statistic F=0.172 0.05 It is violated because the Levine's Test statistic F=0.172 > 0.05 10 11 12 It is not violated because the Levine's Test p-value =0.681 > 0.05 13 14 15 Question 16 (1 point) Based on your answer in the previous question which test should be used to test 16 17 BT whether there is a significant difference in the mean waiting times to fix problems between the two offices? 19 20 21 OF-test for the variance Paired t-test for the mean difference 22 23 24 Z-test for the difference between two means Separate-variance t-test for the difference between two means Pooled-variance t-test for the difference between two means