Question

Upon waking each morning, Angela monitors her resting heart rate and records this information for nine days.


Day 1 67
Day 2 67
Day 3 72
Day 4 70
Day 5 72
Day 6 69
Day 7 72
Day 8 75
Day 9 65

The spread of her resting heart rates is

4 beats per minutes

8 beats per minutes

5 beats per minutes

10 beats per minutes

Answer 1

Could you explain to me how to find the answer? I'm lost with this question TT^TT

Answer 2

I mean I think spread is the same thing as range, where you take the lowest value and subtract it from the highest value.