Question 822312
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Hi,
<u>POISSON Distribution</u> P(x; &#956;) = (e^(-&#956;) (&#956;^x) / x! where  &#956;  is the average number of successes  
x is the actual number of successes that result from the experiment, e  approximately equal to 2.71828. 
for ex: &#956;  = 7   P(x = 6) = {{{e^(-7)(7^6)/6!}}} 
During a typical one-hour lunch period 28 people go to a local deli. (7 during 15 minutes)
During a randomly chosen 15 minute period,what is the probability that:
Using Ti Calculator functions for cumulative probabilities: use poissioncdf(u,x)
a. Only 6 people go to the deli?{{{e^(-7)(7^6)/6!}}} 0r Ti: poissionpdf(7, 6)
 b. More than 12 people go to the deli? Ti: 1- poissioncdf(7, 11)
 c. At most 10 people go to the deli? poissioncdf(7, 10)
 d. No more than 5 people go to the deli? poissioncdf(7, 5)