condition mean min max ZT0-3 450.05 450.05 450.05 ZT4-7 503.2 503.2 503.2 ZT8-11 427.20000000000005 427.20000000000005 427.20000000000005 ZT12-15 263.55 263.55 263.55 ZT16-19 464.34999999999997 464.34999999999997 464.34999999999997 ZT20-23 554.1 554.1 554.1