In a study by WebCriteria, it took an average of 2.1 minutes to locate information and buy products on the Delta Airlines website, compared to an average of 2.7 minutes on the British Airways site. Assuming normal populations with equal standard deviations, data from sheet 3 contains the times (in minutes) required during visits to the two websites. In a suitable one-tail test at the 0.01 level, was the mean time for the Delta visits significantly less than that for the British Airway visits? Sheet 3 Delta British 2,12 2,44 1,40 2,51 2,03 2,48 2,00 2,88 2,34 2,60 1,63 2,38 1,96 2,77 3,36 2,96 1,69 2,82 2,01 2,45 1,86 3,29 2,08 3,05 2,61 2,03 1,62 3,18 1,67 2,65 2,17 2,94 2,69 3,31 2,34 2,93 2,25 1,79 1,89 2,54 1,96 2,70 2,37 2,10 2,29 2,06 Select one: a. t_stat=-5.14 and there is no significant difference between mean time for the Delta visits and British Airway visits b. t_stat=-2.41 and the mean time for the Delta visits significantly less than that for the British Airway visits c. t_stat=-2.41 and the mean time for the British visits significantly less than that for the Delta Airlines visits d. t_stat=-5.14 and the mean time for the Delta visits is significantly less than that for the British Airway visits

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Description: In a study by WebCriteria, it took an average of 2.1 minutes to locate information and buy products on the Delta Airlines website, compared to an average of 2.7 minutes on the British Airways site. Assuming normal populations with equal standard devi

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In a study by WebCriteria, it took an average of 2.1 minutes to locate information and buy products on the Delta Airlines website, compared to an average of 2.7 minutes on the British Airways site. Assuming normal populations with equal standard deviations, data from sheet 3 contains the times (in minutes) required during visits to the two websites. In a suitable one-tail test at the 0.01 level, was the mean time for the Delta visits significantly less than that for the British Airway visits?

Sheet 3

Delta British

2,12 2,44

1,40 2,51

2,03 2,48

2,00 2,88

2,34 2,60

1,63 2,38

1,96 2,77

3,36 2,96

1,69 2,82

2,01 2,45

1,86 3,29

2,08 3,05

2,61 2,03

1,62 3,18

1,67 2,65

2,17 2,94

2,69 3,31

2,34 2,93

2,25 1,79

1,89 2,54

1,96 2,70

2,37

2,10

2,29

2,06

Select one:

t_stat=-5.14 and there is no significant difference between mean time for the Delta visits and British Airway visits

t_stat=-2.41 and the mean time for the Delta visits significantly less than that for the British Airway visits

t_stat=-2.41 and the mean time for the British visits significantly less than that for the Delta Airlines visits

t_stat=-5.14 and the mean time for the Delta visits is significantly less than that for the British Airway visits

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