Question

Ten participants in a health study each ran a distance of 1 mile. The pulse rates of the participants were recorded before and after the run. The pre-run and post-run pulse rates, in pulses per minute (ppm), are shown in the table below.Based on the data in the table, which statement is true?A. The post-run mean and median are the same value.B. The pre-run mean and median are the same value.C. The post-run median is 30 ppm greater than the pre-run median.D. The post-run mean is 30 ppm greater than the pre-run mean.

Answer 1

We have the following info given:

Pre-Run 65 72 71 70 72 70 71 67 70 72

Post-Run 87 95 96 101 110 104 100 101 90 96

We can calculate the mean Pre-Run and we have: 70 and the median = 70.5

Similar for the Post-Run we have: 98 and the median =98

then the best answer for this case is:

D. The post-run mean is 30ppm greater than the pre-run mean