condition mean min max ZT0-3 63.401375 63.401375 63.401375 ZT4-7 60.6007795 60.6007795 60.6007795 ZT8-11 61.080071 61.080071 61.080071 ZT12-15 70.8185745 70.8185745 70.8185745 ZT16-19 79.8648165 79.8648165 79.8648165 ZT20-23 90.12765250000001 90.12765250000001 90.12765250000001