The question was: What is the mean for the group treated with active magnets?
Your Answer: 9
Answer and explanation: Your answer is incorrect. The correct
answer is Just over 4.
The line in the box plot for the Control
Group which is at 9 on the pain rating scale is the median score for
the Control Group. On a box plot, the line represents the median, or
middle score, of the group. The mean is represented by the small
plus sign, +. The Treatment Group, or the group which recieved treatment
with active magnets, has a mean, according to the box plot, of just over 4.