condition mean min max ZT0-3 282.19899999999996 282.19899999999996 282.19899999999996 ZT4-7 247.4325 247.4325 247.4325 ZT8-11 185.482 185.482 185.482 ZT12-15 207.493 207.493 207.493 ZT16-19 203.276 203.276 203.276 ZT20-23 271.86199999999997 271.86199999999997 271.86199999999997