Overview:

The Player Analysis window populates based on the player you have selected in the Main View.  Holdem Manager automatically filters out stats on players in the Player Analysis window if there are not enough hands for a decent sample.

Looking at the Preflop “High Raise 3Bet: 194 / 1087 for 17% (avg 10.7%)”

What that means is:

Out of 1087 chances to raise a 3Bet, this person raised a 3Bet 194 times for a total of 17%.  The (avg) is the average % a player raises a 3Bet in your Holdem Manager database which happens to be 10.7% in the above database

If stats are in line with the average for all players in your Holdem Manager Database, they do not show up in the Player Analysis window.