iddle

&lt;img src="img/potential_outcomes.PNG" width="55%" style="display: block; margin: auto;" /&gt;

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# Interpreting mean comparisons

What we *do* have in our data:
- `\(\overline{Y_T}\)`: Average outcome among people who are treated `\((T_i=1)\)`.
- `\(\overline{Y_U}\)`: Average outcome among people who are untreated `\((T_i=0)\)`.

It's often natural to look at the difference in these group means:
`$$\text{Difference in Means} = \overline{Y_T} - \overline{Y_U}$$`

How is this different from the A