Suppose low variability in a runner's heart rate during a long distance run is a good indication of cardiopulmonary fitness. Which of these statistics measuring pulse rates during a 20 km run would be best?
A) standard deviation = 0.25 beats per minute
B) standard deviation = 0.75 beats per minute
C) standard deviation = 1.6 beats per minute
D) standard deviation = 2.2 beats per minute

Question

Quizplus · Accepted Answer

A lower standard deviation indicates less variability in the heart rate, suggesting better cardiopulmonary fitness.

Suppose Low Variability in a Runner's Heart Rate During a Long