Confidence of the best-fit MOND model depending on various properties of the galaxy. Panel a: stellar mass of the galaxy (derived for d₀ and M/L₀ defined in Sect. 5); panel b: color index B − V of the galaxy; panel c: galaxy ellipticity ϵ; panel d: degree of rotational support λ_Re (Eq. (24)); panel e: rotator criterion number , the vertical dotted line separates the slow and fast rotators; panel f: s₄ kurtosis parameter of the GC system. The marker shapes are the same as in Fig. 3. For the correct models of GC kinematics, the distribution of the confidence value would be homogeneous because of statistical noise. The success of the MOND fits decreases with the characteristics of the galaxy approaching to those found in galaxy cluster centers.