condition mean min max ZT0-3 70.99135 30.2681 92.9043 ZT4-7 10.8362 10.8362 10.8362 ZT8-11 3.519215 3.519215 3.519215 ZT12-15 3.8143725 2.914275 4.71447 ZT16-19 6.3512249999999995 6.3512249999999995 6.3512249999999995 ZT20-23 21.8309 21.8309 21.8309