condition mean min max ZT0-3 32.242533333333334 31.09305 33.7214 ZT4-7 49.8039 49.8039 49.8039 ZT8-11 43.734300000000005 43.734300000000005 43.734300000000005 ZT12-15 56.9907 46.12165 67.85974999999999 ZT16-19 63.5407 63.5407 63.5407 ZT20-23 52.040049999999994 52.040049999999994 52.040049999999994