(Answered) Question to continue problem a second random sample of 12

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Question: To continue problem, a second random sample of 12 adult crabs was collected, and it revealed that 4 individual crabs had been infected. Revise your probability distribution, and plot it. Give a credible set of highest posterior probability close to 95%.

Problem: An article in Forbes discusses the problem of oil and gas reserves around the world.6 Forecasting the amount of oil available is difficult. If the average number of barrels that can be pumped daily from an oil field is a normal random variable with mean 7,200 barrels and standard deviation 505 barrels, and a random sample of 20 days reveals a sample average of 6,100 barrels and standard deviation of 800, give a 95% highest-posterior-density credible set for the average number of barrels that can be pumped daily.

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