condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0176523315 0.0 0.035304663 ZT8-11 0.028442544 0.0 0.056885088 ZT12-15 0.036773128 0.0060186985 0.0675275575 ZT16-19 0.024348929 0.0159039195 0.032793938499999994 ZT20-23 0.0637118745 0.053223058000000004 0.074200691