condition mean min max ZT0-3 0.004139766666666667 0.004139766666666667 0.004139766666666667 ZT4-7 0.02042345 0.02042345 0.02042345 ZT8-11 0.012529889999999998 0.012529889999999998 0.012529889999999998 ZT12-15 0.009937435000000001 0.009937435000000001 0.009937435000000001 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0036379 0.0036379 0.0036379