condition mean min max ZT0-3 10.55 10.55 10.55 ZT4-7 20.9 20.9 20.9 ZT8-11 24.099999999999998 24.099999999999998 24.099999999999998 ZT12-15 45.15 45.15 45.15 ZT16-19 12.200000000000001 12.200000000000001 12.200000000000001 ZT20-23 56.2 56.2 56.2