condition mean min max ZT0-3 43.441475 40.7431 46.139849999999996 ZT4-7 42.93705 42.93705 42.93705 ZT8-11 17.03165 17.03165 17.03165 ZT12-15 0 0 0 ZT16-19 16.3587 16.3587 16.3587 ZT20-23 45.166 45.166 45.166