condition mean min max ZT0-3 2086.7 2086.7 2086.7 ZT4-7 1214.7 1214.7 1214.7 ZT8-11 1188.4499999999998 1188.4499999999998 1188.4499999999998 ZT12-15 1284.0 1284.0 1284.0 ZT16-19 1499.8 1499.8 1499.8 ZT20-23 1989.5 1989.5 1989.5