Does the location of your seat in the classroom play a role in your attendance or grade? 800 students in a physics course were randomly assigned to one of four groups. the 200 students in group 1 sat 0 to 4 meters from the front of the class, 200 students in group 2 sat 4 to 6.5 meters from the front, the 200 students in group 3 sat 6.5 yo 9 meters from the front and the 200 students in group 4 sat 9 to 12 meters from the front. complete (a) through (c).
for the first half of the semester, the attendance for the whole class averaged 83%. so if there is no effect due to seat location, we would expect 83% of the students in each group to attend. the data shows the attendance history for each group. how many students attended on average? is there a significant difference among the groups in attendance patterns? use the level of significance a = 0.01.
group 1 2 3 4
attendance 0.84 0.84 0.84 0.81
the number of students attended in the first group was 168
the number of students attended in the second group was 168
the number of students attended in the third group was 168
the number of students attended in the fourth group was 162
was there a significant difference among the groups in attendance patterns? use the level of significance a = 0.01. answer is no
(b) for the second half of the semester, the groups were rotated so group 1 students moved to the back of the class and group 4 students moved to the front. the same switch took place between groups 2 and 3. the attendance for the second half of the semester averaged 70%. the data shows the attendance records for the original groups. how many students in each group attended on average? is there a significant difference in attendance patterns?
group 1 2 3 4
attendance 0.84 0.75 0.69 0.61
the number of students attended in the first group was
the number of students attended in the second group was
the number of students attended in the third group was
the number of students attended in the fourth group was
was there a significant difference among the groups in attendance patterns? use the level of significance a = 0.01. answer is