condition mean min max ZT0-3 282.35275 270.74 293.9655 ZT4-7 295.29200000000003 295.29200000000003 295.29200000000003 ZT8-11 336.672 336.672 336.672 ZT12-15 0 0 0 ZT16-19 464.29050000000007 464.29050000000007 464.29050000000007 ZT20-23 322.827 322.827 322.827