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Recent observations by the Hubble Space Telescope of Cepheids in the Virgo cluster imply a Hubble Constant H_0=80\±17\\ km/sec/Mpc. We attempt to clarify some issues of interpretation of these results for determining the global cosmological parameters \Ω and \Λ. Using the formalism of Bayesian model comparison, the data suggest a universe with a nonzero cosmological constant \Λ>0, but vanishing curvature: \Ω+\Λ=1.
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A. H. Jaffe (1996) studied this question.
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