condition mean min max ZT0-3 401.42883333333333 174.10649999999998 547.717 ZT4-7 82.8119 82.8119 82.8119 ZT8-11 42.73195 42.73195 42.73195 ZT12-15 124.76165 50.030300000000004 199.493 ZT16-19 210.832 210.832 210.832 ZT20-23 343.4225 343.4225 343.4225