condition mean min max ZT0-3 1087.103725 1087.103725 1087.103725 ZT4-7 611.809968 611.809968 611.809968 ZT8-11 770.9088555000001 770.9088555000001 770.9088555000001 ZT12-15 869.8172045 869.8172045 869.8172045 ZT16-19 1351.8591875 1351.8591875 1351.8591875 ZT20-23 1302.4161395 1302.4161395 1302.4161395