condition mean min max ZT0-3 0.69953075 0.656091 0.7429705 ZT4-7 0.7585059999999999 0.7585059999999999 0.7585059999999999 ZT8-11 0.95271 0.95271 0.95271 ZT12-15 0 0 0 ZT16-19 1.174145 1.174145 1.174145 ZT20-23 0.9718245 0.9718245 0.9718245