condition mean min max ZT0-3 10.38044 10.38044 10.38044 ZT4-7 10.281941 10.281941 10.281941 ZT8-11 9.566876 9.566876 9.566876 ZT12-15 9.631855000000002 9.631855000000002 9.631855000000002 ZT16-19 9.9713365 9.9713365 9.9713365 ZT20-23 10.164908 10.164908 10.164908