Assumed mean (shortcut) for grouped data (x̄ = A + Σ(fd)/Σf)
jee-mainjee-advanced
x̄ = A + Σ(fd)/Σf
What each symbol means
| Symbol | What it stands for |
|---|---|
| A | Assumed mean |
| d_i | x_mid − A |
| f_i | Frequency |
When to use this
Grouped data; pick convenient A (often central class midpoint).