condition mean min max ZT0-3 0.03975681666666667 0.0155314 0.07463895000000001 ZT4-7 0.02904635 0.02904635 0.02904635 ZT8-11 0.0899302 0.0899302 0.0899302 ZT12-15 0.0231008 0.0149795 0.031222100000000003 ZT16-19 0.01451345 0.01451345 0.01451345 ZT20-23 0.07949395000000001 0.07949395000000001 0.07949395000000001