3.7 Freuency vs Weight
Suppose, different judges give different scores, but not all evaluation has same weight.
| Judge | Rating (x) |
Weight (w) |
wx |
|---|---|---|---|
| 1 | 8 | 2 | 16 |
| 2 | 7 | 3 | 21 |
| 3 | 4 | 5 | 20 |
| 4 | 5 | 1 | 5 |
| 5 | 7 | 3 | 21 |
| \(\sum w_i = 14\) | \(\sum w_ix_i = 83\) |
\(\therefore \bar x = \frac{\sum w_ix_i}{\sum w_i}\)
Answer (click to see)
\(\frac{83}{14}\)
## [1] 5.93