condition mean min max ZT0-3 0.6008196105 0.47280340299999996 0.728835818 ZT4-7 1.356694204 1.2075946435 1.5057937645 ZT8-11 4.844244707250001 2.5075797305000003 7.180909684 ZT12-15 11.961691492500002 11.064252960000001 12.859130025 ZT16-19 12.2912626485 10.395412921999998 14.187112375000002 ZT20-23 8.326795262000001 7.8879784695 8.7656120545