condition mean min max ZT0-3 29.3292 20.20295 36.1815 ZT4-7 23.07075 23.07075 23.07075 ZT8-11 16.53445 16.53445 16.53445 ZT12-15 15.44735 13.90215 16.99255 ZT16-19 17.7204 17.7204 17.7204 ZT20-23 29.9865 29.9865 29.9865