SOLUTION: Joe's job is to provide technical support to computer users. Suppose the arrival of calls can be modeled by a Poisson distribution with a mean of 9.5 calls per hour. What's the pro

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Question 841610: Joe's job is to provide technical support to computer users. Suppose the arrival of calls can be modeled by a Poisson distribution with a mean of 9.5 calls per hour. What's the probability that in the next 10 minutes there will be 3 or more calls? Round your answer to the nearest thousandths place.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Note:  Using TI Calcuator

The syntax is 1 – poissoncdf(mean, largest x-value).

mean/10min  is 9.5/6 = %2819%2F2%29%2F6+=+19%2F12

probability that in the next 10 minutes there will be 3 or more calls?

P(x ≥ 3) = 1 – P(x ≤ 2).

1 – poissoncdf(19/12, 2).