Table 4: Coefficients and parameters describing the distribution functions, Pearson I curves, of starburst and spiral populations.
Case y0 a1 a2 m1 m2 Mode Mean $\sigma $ Skew Kurt $\chi_\nu^2$
Starbursts 35.7 4.30 0.14 9.11 0.25 -0.39 -0.70 0.25 1.99 2.39 1.70
$\sigma_{\rm p}$ 12.3 1.55 0.02 3.56 0.18 0.002          
Spirals 43.2 1.47 0.32 4.43 0.19 -0.64 -0.64 0.23 0.05 -0.84 0.77
$\sigma_{\rm p}$ 11.6 0.58 0.01 1.89 0.11 0.01          

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