Frequentist probability density; values of H₀ and their uncertainties for Type Ia supernovae, the Tully‐Fisher relation, the fundamental plane, surface brightness fluctuations, and Type II supernovae, all calibrated by Cepheid variables. Each value is represented by a Gaussian curve (joined dots) with unit area and a 1 σ scatter equal to the random uncertainty. The systematic uncertainties for each method are indicated by the horizontal bars near the peak of each Gaussian. The upper curve is obtained by summing the individual Gaussians. The cumulative (frequentist) distribution has a midpoint (median) value of ﹩H_{0}=72( 71) \pm 4\pm 7﹩ km s⁻¹ Mpc⁻¹. The overall systematic error is obtained by adding the individual systematic errors in quadrature.