condition mean min max ZT0-3 133.3 133.3 133.3 ZT4-7 112.6 112.6 112.6 ZT8-11 158.4 158.4 158.4 ZT12-15 227.10000000000002 227.10000000000002 227.10000000000002 ZT16-19 301.3 301.3 301.3 ZT20-23 133.9 133.9 133.9