condition mean min max ZT0-3 11092.150000000001 11092.150000000001 11092.150000000001 ZT4-7 11841.4 11841.4 11841.4 ZT8-11 11116.900000000001 11116.900000000001 11116.900000000001 ZT12-15 9547.75 9547.75 9547.75 ZT16-19 7876.049999999999 7876.049999999999 7876.049999999999 ZT20-23 9585.95 9585.95 9585.95