Will Tirone

n_rows and n_columns must be positive integer. (Same as #853 and #836)

8

**Describe the bug** This is similar to #853 and #836, but posting anyway just as another example with version info and a screenshot in Jupyter Notebook. Feel free to mark...

Adjusting a typo :) I think either "using" or "with" would make sense, I assume both was a typo.

There is an issue on chapter 6, in the following paragraph ``` and \beta is the difference in means or the ATE in the case of random data \beta =...

Love the book so far :) I noticed that there wasn't any mention of the definition of conditional probability, i.e. "expectation of Y given T = 1" or the definition...