condition mean min max ZT0-3 43.23243333333333 24.45595 59.1112 ZT4-7 23.68905 23.68905 23.68905 ZT8-11 34.46265 34.46265 34.46265 ZT12-15 50.40995 49.51095 51.30895 ZT16-19 57.014700000000005 57.014700000000005 57.014700000000005 ZT20-23 83.7065 83.7065 83.7065