condition mean min max ZT0-3 152.75095095 64.8420613 240.6598406 ZT4-7 292.4954182 287.56606395 297.42477245 ZT8-11 148.82974098249997 104.52341037 193.13607159499998 ZT12-15 11.95164582125 9.8013132295 14.101978413000001 ZT16-19 32.9830016825 28.40761474 37.558388625 ZT20-23 37.8800301 32.43781661 43.32224359