purpose of this paper is to improve the L-Z and M-Z relationships with abundances from high quality spectra. The statistical errors allow such an assessment of the relative quality of the spectra used, which in turn are weighted higher in the regression fits.

For 7 of the 9 dwarf galaxies with direct abundances from multiple regions, the derived oxygen abundances agree within the uncertainties. These support the interpretation that the ISM in typical dwarf galaxies is chemically well mixed, in agreement with past studies [e.g., @skillman89; @ks96; @ks97; @lee06b; @kehrig08; @croxall09; @perez-montero2011]. Various theoretical studies support this result [e.g., @roy95]. However, there are two galaxies for which the oxygen abundances don’t agree. For NGC 4449 the highest signal to noise spectrum is offset to higher log(O/H) values by 0.16 and 0.18 dex compared to the other two. This discrepancy may be due to the possible contamination of an embedded supernova remnant [e.g., @skillman85], or it may be truly offset. Additional spectra are needed to clarify this. NGC 2537 has two high quality optical spectra, but the derived values disagree by 0.26 dex. This factor of nearly two difference is intriguing, warranting further investigation of this object. We increased the error 