Consider again the situation in Example 9.6.2. Let μ1 be the mean of log-rainfall from seeded clouds, and let μ2 be the mean of log-rainfall from unseeded clouds. Use the improper prior for the parameters.
a. Find the posterior distribution of μ1 − μ2.
b. Draw a graph of the posterior probability that |μ1 − μ2| ≤ d as a function of d. |

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