condition mean min max ZT0-3 5.630250029499999 2.424436209 8.836063849999999 ZT4-7 12.794227655 11.74810608 13.84034923 ZT8-11 10.079965442333332 9.318573882 10.841357002666665 ZT12-15 6.604030729333333 6.246741510666667 6.961319948 ZT16-19 5.962476823499999 5.382404283 6.542549364 ZT20-23 13.7466708225 12.342062938333333 15.151278706666666