condition mean min max ZT0-3 227.6 227.6 227.6 ZT4-7 54.4 54.4 54.4 ZT8-11 85.80000000000001 85.80000000000001 85.80000000000001 ZT12-15 107.94999999999999 107.94999999999999 107.94999999999999 ZT16-19 189.95 189.95 189.95 ZT20-23 289.85 289.85 289.85