Flop trips in BB. Help please.

these are his stats for 50 hands.
saw flop: 34%
action on the flop:
raise - 8.7%
bet - 8.7%
call - 17%
check/fold - 65%

first action on the flop after a preflop raise
bet - 1 out of 3
no action - 2 out of 3.

off topic, how do u know if a player is good?