Suppose that the number of defects in a 1200-foot roll
of magnetic recording tape has a Poisson distribution for
which the value of the mean θ is unknown and that the
prior distribution of θ is the gamma distribution with parameters
α = 3 and β = 1. When five rolls of this tape are
selected at random and inspected, the numbers of defects
found on the rolls are 2, 2, 6, 0, and 3. Determine the posterior
distribution of θ.
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