Combined mean of two groups (Pooled mean weighted by group sizes)
jee-mainjee-advanced
Pooled mean weighted by group sizes
What each symbol means
| Symbol | What it stands for |
|---|---|
| n_1,n_2 | Group sizes |
| \bar{x}_1,\bar{x}_2 | Group means |
When to use this
Same measurement scale; groups disjoint covering full pooled set.