interpretation of statistics

[or2az]

I have noticed that in some video games there is a statistic of rank from 1 to 4 with 1 being the best and 4 the worst. It is arrived at by awarding 1 pt for a 1st place win, 2 pts for a 2nd place finish ,etc,etc, and dividing by the # of games played. For example, suppose you played 10 games and won 4 of them, came in 2nd place twice, 3 times in 3rd place, and 1 time in 4th place. Your rank would be calculated as follows;
1st place 4 times x 1 pt = 4
2nd place 2 times x 2 pts = 4
3rd place 3 times x 3 pts = 9
4th place 1 time x 4 pts = 4 this adds up to 21 pts and dividing by 10 games played yields a rank of 2.1
If you have seen this before, what is the significance of this number?

Question 2: Almost all video games list the total number of hands played, your winning rate (tsumo/ron), and your "getting ronned" rate (houjuu- dealing into an opponents hand). For example, suppose over the course of 100 games, you played 1000 hands, won 350 of them (35%) and got "ronned" 150 times (15%).
Is this average? good? very good? excellent? It would seem that in a 4 player game, the average would be 25% for each player. Whats your opinion?
And as for the 15% getting "ronned", same question? When you are in riichi and have no control over your discards, you are bound to get "ronned" some of the time, so is 15% a good rate? bad? excellent? Whats your opinion?

[shinkiii]

1: That number means your average placing rate. It's the table place you would be expected to get on average if you played against 3 other opponents of any skill level since it averages all of the games played.

2: agari/furikomi rate averages depend a lot on play level, but a 2:1 win/loss ratio is very good. the lower the furikomi rate, the better, but that can mean you're taking fewer risks than you should be because of the potential risk payoff. the proportion is what matters more than the base furikomi rate, but it shouldn't be much higher than 15%.