Comparison of UMi distance modulus (grey filled circle), obtained using the Gold sample RR Lyrae stars and the M_G –[Fe/H] relation, with literature measurements obtained from different methods and distance indicators: CMD (cyan), HB level (red), RR Lyrae stars (purple) and RGB Tip (blue). The dotted lines show the uncertainty (± 0.11 mag) associated with our distance modulus estimate (see text for details). References: (1) Olszewski & Aaronson (1985); (2) Kalirai et al. (2013); (3) Dolphin (2002); (4) Mighell & Burke (1999); (5) Weisz et al. (2014); (6) Irwin & Hatzidimitriou (1995); (7) Ruhland et al. (2011); (8) Webbink (1985); (9) Carrera et al. (2002); (10) Cudworth et al. (1986); (11) N88; (12) Tammann et al. (2008); (13) Frayn & Gilmore (2003); (14) Tully et al. (2013); (15) Bellazzini et al. (2002).