Table 1 Difference between weighted and unweighted averages
From: Operational research as implementation science: definitions, challenges and research priorities
Location (i) | Patients (w i ) | Travel time (x i ; minutes) |
|---|---|---|
1 | 1 | 30 |
2 | 5 | 10 |
Calculations | ||
 Average travel time | \( \frac{30+10}{2}=20\ \min \) | |
 Weighted average travel time | \( \frac{\left(1\times 30\right)+\left(5\times 10\right)}{1+5}=13.3\ \min \) | |