condition mean min max ZT0-3 0.078028778 0.041131045 0.114926511 ZT4-7 0.024813613249999998 0.0 0.049627226499999996 ZT8-11 0.05120082325 0.0173825895 0.085019057 ZT12-15 0.47166938999999997 0.26077968549999997 0.6825590945 ZT16-19 0.26661209575 0.218597394 0.3146267975 ZT20-23 0.31516426200000003 0.314870742 0.315457782