condition mean min max ZT0-3 61.75 61.75 61.75 ZT4-7 63.5 63.5 63.5 ZT8-11 69.55000000000001 69.55000000000001 69.55000000000001 ZT12-15 109.05000000000001 109.05000000000001 109.05000000000001 ZT16-19 130.1 130.1 130.1 ZT20-23 62.95 62.95 62.95