Question 841610
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Hi,
Note:  Using TI Calcuator
The syntax is 1 – poissoncdf(mean, largest x-value).
mean/10min  is 9.5/6 = {{{(19/2)/6 = 19/12}}}
probability that in the next 10 minutes there will be 3 or more calls?
P(x &#8805; 3) = 1 – P(x &#8804; 2).
1 – poissoncdf(19/12, 2).