A sports coach measured the reaction times (in milliseconds) of 80 athletes and…
MATHEMATICS · Multi-part · A Level · Mathematics · Data presentation and interpretation · Data presentation and interpretation
Problem
A sports coach measured the reaction times (in milliseconds) of 80 athletes and organised the data as follows: (i) Find the arithmetic mean of the reaction times by any method of your choice.| Reaction time (ms) | 140–160 | 160–180 | 180–200 | 200–220 | 220–240 | 240–260 |
|---|---|---|---|---|---|---|
| Number of athletes | 6 | 11 | 24 | 18 | 12 | 9 |