6. relatively minor repetitive impacts to the head such as
those experienced by elite male soccer players when hit.
ting a soccer ball with their heads may cause brain dam-
age, according to the journal of the american medical
association. one indicator of mild brain injury is called
radial diffusivity. the radial diffusivity measurements of
twelve right-handed male soccer players were compared
to those of eleven competitive swimmers (who are not
likely to have repeated head impacts). which type of plot
would not be appropriate for assessing the difference
between the two groups?
a) stacked dotplots, one for each group, on the same
axis
b) side-by-side boxplots
c) stacked bar graphs
d) a back-to-back stem-and-leaf plot
e) a pair of histograms, one above the other, on the same
axis.