condition mean min max ZT0-3 18.19225 18.19225 18.19225 ZT4-7 10.65448 10.65448 10.65448 ZT8-11 66.87360000000001 66.87360000000001 66.87360000000001 ZT12-15 48.84 48.84 48.84 ZT16-19 42.361450000000005 42.361450000000005 42.361450000000005 ZT20-23 8.73452 8.73452 8.73452