Applet Exercise In Exercise 16.7, we reconsidered our introductory example where the
Chapter 16, Problem 16.15(choose chapter or problem)
Applet Exercise In Exercise 16.7, we reconsidered our introductory example where the number of responders to a treatment for a virulent disease in a sample of size n had a binomial distribution with parameter p and used a beta prior for p with parameters = 1 and = 3. We subsequently found that, upon observing Y = y responders, the posterior density function for p | y is a beta density with parameters = y + = y + 1 and = n y + = n y + 3. If we obtained a sample of size n = 25 that contained 4 people who responded to the new treatment, find a 95% credible interval for p. [Use the applet Beta Probabilities and Quantiles at www.thomsonedu.com/statistics/wackerly. Alternatively, if W is a beta-distributed random variable with parameters and , the R (or S-Plus) command qbeta(p,,) gives the value w such that P(W w) = p.]
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