condition mean min max ZT0-3 220.61149999999998 220.61149999999998 220.61149999999998 ZT4-7 196.413 196.413 196.413 ZT8-11 176.6395 176.6395 176.6395 ZT12-15 192.13150000000002 192.13150000000002 192.13150000000002 ZT16-19 239.5785 239.5785 239.5785 ZT20-23 227.4595 227.4595 227.4595