condition mean min max ZT0-3 11.188099999999999 11.188099999999999 11.188099999999999 ZT4-7 23.21465 23.21465 23.21465 ZT8-11 12.58645 12.58645 12.58645 ZT12-15 11.95275 11.95275 11.95275 ZT16-19 8.56245 8.56245 8.56245 ZT20-23 6.59305 6.59305 6.59305