condition mean min max ZT0-3 0.1200343975 0.0 0.240068795 ZT4-7 1.9300468025000002 0.6868957204999999 3.1731978845000004 ZT8-11 8.815626440499999 6.2464339565 11.3848189245 ZT12-15 11.7954395225 11.71476142 11.876117625 ZT16-19 8.867018865 7.991853184 9.742184546 ZT20-23 10.36396964875 10.272806149 10.4551331485