condition mean min max ZT0-3 132.85000000000002 132.85000000000002 132.85000000000002 ZT4-7 296.6 296.6 296.6 ZT8-11 222.5 222.5 222.5 ZT12-15 196.64999999999998 196.64999999999998 196.64999999999998 ZT16-19 171.7 171.7 171.7 ZT20-23 152.7 152.7 152.7