Statistics don't matter to college coaches, until you get to college!!! We realize that there is no statistical consistency with high school and club matches; too many matches with too many players taking statistics (my favorite is when the stat keeper player on the bench, gets called into the match and drops the clipboard so fast it bounces three or four times before coming to a rest!). Beyond that, we trust what we see a thousand percent more than what we read. Better to have the family filming the player to send out current video to coaches.
I think for the PSA, it would be good for a hitter to know what statistical percentage they are hitting for their own skill development. Too often, a hitter may think they are doing well when they get a kill or two late in the game at a critical time, forgetting about multiple errors they made early in the game. What all college volleyball coaches want (other than more salary, more staff, more budget, more marketing support, better referees, perfect off court SA behavior and good coffee) is hitters that attack zeros and pluses, with no negatives. As simple as that sounds, we would rather have a hitter get 3 kills and dug 7 times on 10 swings, rather than 5 errors and 5 kills. Zeros are a good swing because it allows for the opportunity to win the point in a rally.
As the club/school won't be able to do this, you can easily teach yourself to take hitting and passing stats, which are the two keys stats an outside hitter would need to self evaluate - Hitting percentage is generated by Kills minus Errors (hit out or blocked straight down), divided by the total number of attacks (zero attacks - balls that are dug or covered when blocked are just counted in total number of attacks). This equation will tell you the hitting percentage; anything over .300 is good, .200 to .300 is solid, under .200 is marginal and negative hitting is a bad, bad thing (look away, look away, don't look at the stats, look away).
Passing statistics are generated by assigning a value to each pass; a perfect pass to the setting area is a 3, a pass in which the setter can only set high front or back is a 2, a pass where the setter can only set high outside or back row is a 1, and any overpass, shank or ball passed so bad the team cannot even set a hitter is a zero. Rate/number each pass, then add up the total and divide by the number of attempted passes. Anything above a 2 is good, 1 to 2 is marginal and below a 1 is mucho not good!
Hopefully this gives you a quick education on taking some stats for your VolleyPSA to use for self evaluation. As for college volleyball coaches, we are not smart enough to read anyways; we just want to see the PSA play!