condition mean min max ZT0-3 100.3 100.3 100.3 ZT4-7 74.4 74.4 74.4 ZT8-11 43.95 43.95 43.95 ZT12-15 78.45 78.45 78.45 ZT16-19 107.94999999999999 107.94999999999999 107.94999999999999 ZT20-23 83.85 83.85 83.85