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A tiny error but still confusing to a learner.\r\n\r\nAlso the bayes.Rmd says: var(theta | y) can be shown to be ... = 0.026.\r\n\r\nIMHO the standard deviation sd (theta | y) should be the sqare root of this: sqrt(0.026) = 0.1612.\r\n\r\nbut at the end of the paragraph below you say the 95% credible interval:\r\n\r\n    this turns out to be: .285 ± 0.052.\r\n\r\nI though confidence intervals at the 95% level are approx. SDs wide. 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