The normal pulse rate of a 13-year-old is between 70 and 100 beats per minute. As part of a health program, the medical staff at Grant Middle School measured the resting pulse rate of 12 randomly selected students in grades 7 and 8. The box plot shows the data for each group. Which statement correctly compares the data sets? A.
The difference of the medians is about half of the interquartile range of either data set.
B.
The difference of the medians is about 2 times the interquartile range of either data set.
C.
The difference of the medians is about one-fourth of the interquartile range of either data set.
D.
The difference of the medians is about 4 times the interquartile range of either data set.