condition mean min max ZT0-3 9.659886 9.659886 9.659886 ZT4-7 9.631426000000001 9.631426000000001 9.631426000000001 ZT8-11 10.425830000000001 10.425830000000001 10.425830000000001 ZT12-15 10.4145775 10.4145775 10.4145775 ZT16-19 9.841126500000001 9.841126500000001 9.841126500000001 ZT20-23 10.827442 10.827442 10.827442