condition mean min max ZT0-3 204.76100000000002 204.76100000000002 204.76100000000002 ZT4-7 182.01999999999998 182.01999999999998 182.01999999999998 ZT8-11 216.346 216.346 216.346 ZT12-15 189.6035 189.6035 189.6035 ZT16-19 218.3395 218.3395 218.3395 ZT20-23 167.0765 167.0765 167.0765