condition mean min max ZT0-3 6.011587499999999 4.988625 7.034549999999999 ZT4-7 4.386044999999999 4.386044999999999 4.386044999999999 ZT8-11 5.0513650000000005 5.0513650000000005 5.0513650000000005 ZT12-15 0 0 0 ZT16-19 4.997085 4.997085 4.997085 ZT20-23 7.523245 7.523245 7.523245