condition mean min max ZT0-3 0.11219771874999998 0.082815668 0.14157976949999998 ZT4-7 0.0 0.0 0.0 ZT8-11 0.078122701 0.0 0.156245402 ZT12-15 0.2595531363333334 0.0 0.5191062726666668 ZT16-19 0.06604082566666666 0.0 0.13208165133333333 ZT20-23 0.037775936499999996 0.0 0.07555187299999999