Question 4 (10 points) Rate of unexpected phone call to a university telephone exchange is .65 on a daily basis. Find the probability of at least 5 unexpected phone calls in one day. 0.00070 0.00050 0.00010 0.00040
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The Poisson distribution formula is given by P(X ≥ k) = 1 - Σ (e^(-λ) * (λ^x) / x!), where λ is the rate of the event (in this case, 0.65), and k is the minimum number of events we are interested in (in this case, 5). Show more…
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