condition mean min max ZT0-3 132.302229 132.302229 132.302229 ZT4-7 30.390577999999998 30.390577999999998 30.390577999999998 ZT8-11 27.676511499999997 27.676511499999997 27.676511499999997 ZT12-15 48.89779 48.89779 48.89779 ZT16-19 79.3590025 79.3590025 79.3590025 ZT20-23 68.39763450000001 68.39763450000001 68.39763450000001