condition mean min max ZT0-3 27.8 27.8 27.8 ZT4-7 17.1 17.1 17.1 ZT8-11 27.6 27.6 27.6 ZT12-15 31.3 31.3 31.3 ZT16-19 13.95 13.95 13.95 ZT20-23 11.350000000000001 11.350000000000001 11.350000000000001