condition mean min max ZT0-3 0.7740755 0.6093740000000001 0.938777 ZT4-7 0.9033725 0.9033725 0.9033725 ZT8-11 0.8591985 0.8591985 0.8591985 ZT12-15 0 0 0 ZT16-19 0.8673575 0.8673575 0.8673575 ZT20-23 0.8594854999999999 0.8594854999999999 0.8594854999999999