condition mean min max ZT0-3 141.998382 141.998382 141.998382 ZT4-7 291.228163 291.228163 291.228163 ZT8-11 199.6597025 199.6597025 199.6597025 ZT12-15 192.485572 192.485572 192.485572 ZT16-19 134.17943400000001 134.17943400000001 134.17943400000001 ZT20-23 152.691787 152.691787 152.691787