condition mean min max ZT0-3 288.8915 288.8915 288.8915 ZT4-7 235.6585 235.6585 235.6585 ZT8-11 209.62 209.62 209.62 ZT12-15 233.1525 233.1525 233.1525 ZT16-19 319.127 319.127 319.127 ZT20-23 286.2735 286.2735 286.2735