condition mean min max ZT0-3 54.129850000000005 54.129850000000005 54.129850000000005 ZT4-7 46.881 46.881 46.881 ZT8-11 29.58415 29.58415 29.58415 ZT12-15 62.984300000000005 62.984300000000005 62.984300000000005 ZT16-19 57.8328 57.8328 57.8328 ZT20-23 54.6766 54.6766 54.6766