# Question

Let X be an Erlang random variable with PDF,

Derive a saddle point approximation for the left tail probability, Pr (X< xo). Compare your result with the exact value for 0 ≤ xo < E [X].

Derive a saddle point approximation for the left tail probability, Pr (X< xo). Compare your result with the exact value for 0 ≤ xo < E [X].

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