Chaim,
Still a good question.
It is possible to trade more than the ADV (average daily volume) with POV (percent of volume) on higher volume days: not all days will trade with one (average) volume.
But ultimately, I think the author made a mistake including some of those numbers in the table.
I tried to reread that chapter and distill-out what the author was doing in a post, with the main goal of including some of the equations that could easily be put into a spreadsheet.
Ultimately I decided not to do that here because the definition of the constants in the equations are too tedious for a post I think (e.g., do I use standard deviation or annualized standard devision in percent or decimal form?).
But once the constants are sorted out one could easily put this into a spreadsheet.
If you want to explore this more and buy the book, you could get the data in the table split out into Large-cap orders, Small-cap orders as well as buy and sell orders (after taking some time to maker sure you have the right constants without errors—including any author errors or omissions–for your important trades).
There are other papers and sources for the equation. Some of the equations vary a little. Yuval uses one of them above. I am not sure whether he has gotten this directly from a paper or whether he has adapted the constants to his own trading data: it is not hard to find your own constants with a regression. But either way this is a good example of what can be found in the literature and how it can be used.
Best,
Jim