condition mean min max ZT0-3 16.5026 16.5026 16.5026 ZT4-7 14.3459 14.3459 14.3459 ZT8-11 10.019314999999999 10.019314999999999 10.019314999999999 ZT12-15 14.0106 14.0106 14.0106 ZT16-19 17.499433333333332 17.499433333333332 17.499433333333332 ZT20-23 20.6839 20.6839 20.6839