Show that each of the following families is an exponential family. (a) Normal family with either parameter
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(a) Normal family with either parameter μ or σ known
(b) Gamma family with either parameter α or α known or both unknown
(c) Beta family with either parameter α or β known or both unknown
(d) Poisson family
(e) Negative binomial family with r known, 0 < p < 1
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