condition mean min max ZT0-3 0.87426685125 0.818041005 0.9304926975000001 ZT4-7 3.9886103555 2.4860368675 5.4911838435 ZT8-11 9.086156984999999 7.251191401 10.921122569 ZT12-15 13.35964393 12.222976025 14.496311835 ZT16-19 10.613805495000001 10.40623676 10.82137423 ZT20-23 10.23039031 9.895444455 10.565336165000002