condition mean min max ZT0-3 66.04762500000001 64.8203 67.27495 ZT4-7 76.08085 76.08085 76.08085 ZT8-11 64.80145 64.80145 64.80145 ZT12-15 0 0 0 ZT16-19 57.62145 57.62145 57.62145 ZT20-23 63.913850000000004 63.913850000000004 63.913850000000004