Arithmetic mean (AM) of ungrouped data (Mean = (sum of all observations) ÷ (number of observations))
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Mean = (sum of all observations) ÷ (number of observations)
What each symbol means
| Symbol | What it stands for |
|---|---|
| n | Number of observations |
| x_i | i-th observation |
| \bar{x} | Arithmetic mean |
When to use this
All x_i belong to the same variable on the same scale; weights equal unless using frequency form.