condition mean min max ZT0-3 0.09136697499999999 0.01683245 0.16590149999999998 ZT4-7 0.03374695 0.03374695 0.03374695 ZT8-11 0.06709380000000001 0.06709380000000001 0.06709380000000001 ZT12-15 0 0 0 ZT16-19 0.0828541 0.0828541 0.0828541 ZT20-23 0.0828895 0.0828895 0.0828895