condition mean min max ZT0-3 0.0353949425 0.0 0.070789885 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.039582964 0.0 0.079165928 ZT16-19 0.03354794533333333 0.0 0.06709589066666666 ZT20-23 0.0 0.0 0.0