Question

chapter 3.2 homework score: 38/102 answered: 12/33 question 13 3.2 measures of spread: standard deviation and variance 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 75.9 and a standard deviation of 10.83. the pulse rates after they ran in place for one minute had a mean of 125.23 and a standard deviation of 25.59. which of the following statements best compares the means? select an answer which of the following statements best compares the standard deviations? select an answer question help: message instructor post to forum submit question

Explanation:

Step1: Compare the means

The mean pulse - rate before exercise is 75.9 bpm and after exercise is 125.23 bpm. Since 125.23>75.9, the mean pulse - rate after running in place for one minute is higher than the mean pulse - rate before exercise.

Step2: Compare the standard deviations

The standard deviation of pulse - rates before exercise is 10.83 and after exercise is 25.59. Since 25.59 > 10.83, the standard deviation of pulse - rates after running in place for one minute is higher than the standard deviation of pulse - rates before exercise.

Answer:

The mean pulse - rate after running in place for one minute is higher than the mean pulse - rate before exercise. The standard deviation of pulse - rates after running in place for one minute is higher than the standard deviation of pulse - rates before exercise.