Question

Levi and Rachel performed an experiment in which they measured the heart rate of an average adult.

On one day, Levi measured the resting heart rate of an adult. Then, the adult walked on a treadmill at a rate of four miles per hour. After thirty minutes, he measured the adult's heart rate again and recorded the data. Levi allowed the adult's heart rate to return to its original resting rate and then repeated his experiment two more times.

Two days later, Rachel performed the same experiment with the same adult. She, too, measured the resting heart rate and the heart rate after exercising. Their data appears below.


LEVI'S DATA RACHEL'S DATA
Resting Heart Rate = 62 bpm* Resting Heart Rate = 60 bpm*
Trial Heart Rate after Exercise
1 120 bpm
2 122 bpm
3 118 bpm
Trial Heart Rate after Exercise
1 118 bpm
2 119 bpm
3 120 bpm

* bpm = beats per minute


How do Levi and Rachel's results compare?
A.
Their data is unreasonable.
B.
The differences in their data are not significant.
C.
Their data is exactly the same.
D.
The differences in their data are too significant to report.

Answer 1

B. The differences in their data are not significant.

Step-by-step explanation:

Compare Levi's data with Rachel's and you'd see that there isn't much difference between the two. For example, Levi recorded a 62 bpm Resting Heart Rate whilst Rachel recorded 60 bpm - not much of a difference.

Answer 2

B. The differences in their data are not significant.

Step-by-step explanation: