condition mean min max ZT0-3 222.06233333333333 191.6635 250.721 ZT4-7 184.93099999999998 184.93099999999998 184.93099999999998 ZT8-11 455.91700000000003 455.91700000000003 455.91700000000003 ZT12-15 628.65125 612.5545 644.748 ZT16-19 574.7570000000001 574.7570000000001 574.7570000000001 ZT20-23 374.6935 374.6935 374.6935