The resting pulse rates were recorded for 16 boys in P.E. class before and after they exercised. The dot plots show the results.
Before Exercise After Exercise
Beats per Minute Beats per Minute
Which statement is best supported by the data?
Responses
A The range of the data before exercise is less than the range of the data after exercise.The range of the data before exercise is less than the range of the data after exercise.
B The mode of the data before exercise is greater than the mode of the data after exercise.The mode of the data before exercise is greater than the mode of the data after exercise.
C The median of the data after exercise is less than the median of the data before exercise.The median of the data after exercise is less than the median of the data before exercise.
D The mean of the data after exercise is greater than the mean of the data before exercise.The mean of the data after exercise is greater than the mean of the data before exercise.
A The range of the data before exercise is less than the range of the data after exercise.
This statement is best supported by the data, as the dot plot shows that the range of pulse rates before exercise is narrower than the range of pulse rates after exercise. This can be observed by comparing the spread of the data points in each dot plot.