condition mean min max ZT0-3 0.7210423333333333 0.6650739999999999 0.7756665 ZT4-7 0.8832845 0.8832845 0.8832845 ZT8-11 0.524672 0.524672 0.524672 ZT12-15 0.7509055 0.415346 1.086465 ZT16-19 0.6792484999999999 0.6792484999999999 0.6792484999999999 ZT20-23 0.9727005 0.9727005 0.9727005