condition mean min max ZT0-3 138.642 138.642 138.642 ZT4-7 209.115 209.115 209.115 ZT8-11 135.48149999999998 135.48149999999998 135.48149999999998 ZT12-15 79.79295 79.79295 79.79295 ZT16-19 42.0226 42.0226 42.0226 ZT20-23 60.2833 60.2833 60.2833