Consider an Experiment in Which Female and Male Rats Are

Multiple Choice

Consider an experiment in which female and male rats are weighed and then their food consumption is measured. Which of the following is a flaw in the figure showing data from this experiment?
​
​

A) Data for an unequal number of subjects for each of the two sexes are displayed.
B) The pair of colors, red and green, is used.
C) The groups have both different colors and different shapes, which is redundant; only one aspect of the symbols should differ.
D) The wrong variables are plotted on the axes; they should be switched.