condition mean min max ZT0-3 252.68375 251.075 254.29250000000002 ZT4-7 176.607 176.607 176.607 ZT8-11 174.665 174.665 174.665 ZT12-15 0 0 0 ZT16-19 261.002 261.002 261.002 ZT20-23 238.548 238.548 238.548