condition mean min max ZT0-3 5.03497876625 4.5657010975 5.504256435 ZT4-7 3.287566744 2.7613751559999997 3.813758332 ZT8-11 4.190300765 3.6615267559999998 4.719074774 ZT12-15 4.56057707575 4.3524980655 4.768656086 ZT16-19 5.26581930575 4.798637082999999 5.7330015285 ZT20-23 7.2241960975 6.8529723645 7.595419830499999