1120 Below are several sample means For each class calculate

11.20: Below are several sample means. For each class, calculate the differences between the means for students who sit in the front versus the back of the classroom.

Mean test grades               Students in the front                Students in the back

Class 1                                         82                                            78

Class 2                                         79.5                                                   77.41

Class 3                                         71.5                                         76

Class 4                                          72                                          71.3

Solution

you need to find the difference between both group for each class . You have the mean for each case so you just need to subtract

DIFFRENCE BETWEEN MEANS

Class 1 = 82-78 = 4

Class 2 = 79.5-77.41 = 2.09

Class 3 = 71.5 - 76 =-4.5

Class 4 = 72-71.3 = 0.7