condition mean min max ZT0-3 50.425533333333334 34.15965 59.31265 ZT4-7 45.0447 45.0447 45.0447 ZT8-11 13.0582 13.0582 13.0582 ZT12-15 10.81926 6.74527 14.893249999999998 ZT16-19 18.731650000000002 18.731650000000002 18.731650000000002 ZT20-23 29.689 29.689 29.689