Plots and boundaries
a. Construct stem and leaf plots of the mean counts of the teams for each group, and combine these two plots in a back-to-back stem and leaf plot.
b. Construct stem and leaf plots for the standard deviations for each group, and combine these in a back-to-back stem and leaf plot.
c. Compute the two boundaries for these means, x - 25, and x + 25 for each group, where x = overall mean for the group, and s = average of all the standard deviations for that group.
d. How many of the sample means for each group fall outside these boundaries?