Question: 2. If Xi are iid exponential with mean A, show that S,- with shape parameter r and mean r X 3. Show that -+-

2. If Xi are iid exponential with mean A, show that S,-

2. If Xi are iid exponential with mean A, show that S,- with shape parameter r and mean r X 3. Show that -+- x r is Gamma distributed IP(X > r) = IP(X > y) for X being Exponentially distributed and Geometrically distributed on the positive integers.

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