condition mean min max ZT0-3 230.66635345000003 229.11225770000001 232.22044920000002 ZT4-7 241.39297325 229.9097662 252.87618030000002 ZT8-11 231.92211615 214.34729133333332 249.49694096666667 ZT12-15 209.38539315 209.0700709 209.7007154 ZT16-19 196.19766011666667 184.00508969999998 208.39023053333335 ZT20-23 145.9317745 145.45374919999998 146.4097998