condition mean min max ZT0-3 74.503955255 70.80383293999999 78.20407757000001 ZT4-7 72.33509126999999 70.6631725 74.00701004 ZT8-11 76.997407555 74.02388884 79.97092626999999 ZT12-15 72.08287245166667 71.97669326666667 72.18905163666668 ZT16-19 74.42130631166665 74.02513430666666 74.81747831666667 ZT20-23 74.32220903666666 67.60723100999999 81.03718706333333