Joggers 1 and 2 run. Jogger 1's mean run is 5.25 whereas Jogger 2's mean run is 4.20. What can we infer about Jogger 1 and 2? What can't we infer?
We'd infer that Jogger 1 (mean
The mean is calculated by adding the values and then dividing by the number of terms. For instance, the mean of 2, 3, 4 is:
From comparing the two means, we'd infer that Jogger 1 (mean
What don't we know?
- how many times Jogger 1 and Jogger 2 have jogged. Maybe they've gone 100 times. Or maybe once.
- how tightly to the means Jogger 1 and Jogger 2 stay. Do they both have a set track they run so that the distance never varies? Or is it that one day they run one unit and the next they run 10.