condition mean min max ZT0-3 98.619638 98.619638 98.619638 ZT4-7 124.44903049999999 124.44903049999999 124.44903049999999 ZT8-11 119.86622550000001 119.86622550000001 119.86622550000001 ZT12-15 105.697532 105.697532 105.697532 ZT16-19 107.59358850000001 107.59358850000001 107.59358850000001 ZT20-23 84.169404 84.169404 84.169404