condition mean min max ZT0-3 1.4519875 0.6021124999999999 2.570245 ZT4-7 1.5623749999999998 1.5623749999999998 1.5623749999999998 ZT8-11 22.76245 22.76245 22.76245 ZT12-15 18.2617525 8.553105 27.9704 ZT16-19 4.878565 4.878565 4.878565 ZT20-23 2.6094049999999998 2.6094049999999998 2.6094049999999998