condition mean min max ZT0-3 6.556274999999999 6.556274999999999 6.556274999999999 ZT4-7 4.566705000000001 4.566705000000001 4.566705000000001 ZT8-11 5.0733250000000005 5.0733250000000005 5.0733250000000005 ZT12-15 6.15652 6.15652 6.15652 ZT16-19 9.230355 9.230355 9.230355 ZT20-23 7.98864 7.98864 7.98864