condition mean min max ZT0-3 10.2 10.2 10.2 ZT4-7 14.0 14.0 14.0 ZT8-11 13.0 13.0 13.0 ZT12-15 13.350000000000001 13.350000000000001 13.350000000000001 ZT16-19 10.8 10.8 10.8 ZT20-23 10.15 10.15 10.15