condition mean min max ZT0-3 165.917 150.827 181.007 ZT4-7 134.55 134.55 134.55 ZT8-11 110.548 110.548 110.548 ZT12-15 0 0 0 ZT16-19 165.04 165.04 165.04 ZT20-23 236.235 236.235 236.235