The brand name of McDonald's has a 95% recognition rate. A McDonald's executive wishes to see this result for herself by testing it on a group of 15 individuals. She surmises that it would be extremely unlikely if any less than 13 out of the 15 individuals do not recognize the brand.
A) Show that we can use a binomial probability distribution if we assume that a success is someone recognizing the brand. (This I believe I understand - just need to state that it adheres to the 4 rules.)
B) Find the probability of having 13 or more people recognize the brand.
C) Would you consider it unusual/unlikely if less than 13 people (at most 12) recognized the brand? Why or why not?
**Our professor doesn't want us to write out the formulas and do it longform.
So, in class we have been using the n,p,x formula (binompdf in the DISTR menu) on our calculators where n= the number of trials, p= probability of a succcess for an individual event, and x= number of desired successes