condition mean min max ZT0-3 9.96046 9.36797 10.55295 ZT4-7 13.1211 13.1211 13.1211 ZT8-11 11.68282 11.68282 11.68282 ZT12-15 0 0 0 ZT16-19 13.953949999999999 13.953949999999999 13.953949999999999 ZT20-23 14.9821 14.9821 14.9821