condition mean min max ZT0-3 16.08128131 16.06564201 16.09692061 ZT4-7 10.659286625750001 10.547410990500001 10.771162261 ZT8-11 12.7811129025 11.464299870000001 14.097925935 ZT12-15 16.01503682725 12.9583418195 19.071731835 ZT16-19 11.40296105525 9.7519939755 13.053928135 ZT20-23 21.453561462499998 19.658365955 23.24875697