condition mean min max ZT0-3 0.014579291999999999 0.0 0.029158583999999998 ZT4-7 0.0254495385 0.0 0.050899077 ZT8-11 0.0897592005 0.0529708045 0.1265475965 ZT12-15 0.189119395 0.12495563700000001 0.253283153 ZT16-19 0.2225926955 0.171537525 0.273647866 ZT20-23 0.322712782 0.283792618 0.361632946