condition mean min max ZT0-3 99.52451666666667 86.16335000000001 110.33305 ZT4-7 76.27425 76.27425 76.27425 ZT8-11 77.40635 77.40635 77.40635 ZT12-15 151.675575 105.56815 197.78300000000002 ZT16-19 134.075 134.075 134.075 ZT20-23 99.09425 99.09425 99.09425