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Table 1 The population parameter values for four different distributional shapes arising from the CRD

From: The Chapman-Richards Distribution and its Relationship to the Generalized Beta

Population parameter Concave Positively Skewed Rotated-Sigmoid U-Shaped (Bathtub)
m -0.180 -0.280 0.260 0.540
η 0.840 0.540 0.330 0.480
γ 0.012 0.004 0.019 0.088
R 20.000 20.000 20.000 21.000
M 0.019 0.019 0.019 0.026
d 36.614 46.166 47.353 39.962
\({\tilde {N}}\) 1052.632 1052.632 1052.632 807.692
\({\tilde {B}}\) 32.474 19.939 35.858 31.689
σ 1 0.080 0.080 0.100 0.080
σ 2 0.150 0.120 0.180 0.160