condition mean min max ZT0-3 36.309725 36.08655 36.5329 ZT4-7 52.742900000000006 52.742900000000006 52.742900000000006 ZT8-11 40.211299999999994 40.211299999999994 40.211299999999994 ZT12-15 0 0 0 ZT16-19 33.17245 33.17245 33.17245 ZT20-23 33.0798 33.0798 33.0798