condition mean min max ZT0-3 16.235 16.235 16.235 ZT4-7 11.3284 11.3284 11.3284 ZT8-11 12.2895 12.2895 12.2895 ZT12-15 11.0734 11.0734 11.0734 ZT16-19 16.86405 16.86405 16.86405 ZT20-23 15.16695 15.16695 15.16695