Question

pulse rates (in bpm) were collected from a random sample of females who are non - smokers but do drink alcohol. the pulse rates before they exercised had a mean of 74.99 and a standard deviation of 11.1. the pulse rates after they ran in place for one minute had a mean of 126.5 and a standard deviation of 24.7. which of the following statements best compares the means? the pulse rates before they exercised had a lower average than the pulse rates after they ran in place for one minute. which of the following statements best compares the standard deviations? select an answer select an answer the pulse rates before they exercised had a higher average than the pulse rates after they ran in place for one minute. the pulse rates before they exercised had a lower average than the pulse rates after they ran in place for one minute. the middle of the pulse rates before they exercised was higher than the middle of the pulse rates after they ran in place for one minute. the middle of the pulse rates before they exercised was lower than the middle of the pulse rates after they ran in place for one minute. the pulse rates before they exercised were more consistent than the pulse rates after they ran in place for one minute. the pulse rates before they exercised were less consistent than the pulse rates after they ran in place for one minute.

Explanation:

Standard deviation measures the spread or consistency of data. A lower standard deviation indicates more consistency. The standard deviation of pulse rates before exercise is \(11.1\) and after exercise is \(24.7\). Since \(11.1<24.7\), the pulse rates before exercise are more consistent.

Answer:

The pulse rates before they exercised were more consistent than the pulse rates after they ran in place for one minute.