condition mean min max ZT0-3 66.25 66.25 66.25 ZT4-7 134.1 134.1 134.1 ZT8-11 141.6 141.6 141.6 ZT12-15 133.45 133.45 133.45 ZT16-19 73.6 73.6 73.6 ZT20-23 94.25 94.25 94.25