Question 1053849
a) Describe a trial. Can we model a trial as having only two outcomes? 
If so, what is success? What is failure?
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A trial consists of looking at the class status of a student enrolled in introductory statistics. 
Yes we can model this trial with "freshman" being a success and "any other class" as a failure.
p = (.10*.50) = .05 , q = .95, n = 5
P( x = 2F) = binompdf(5,.05,5)
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|sampling without replacement
30stdents: 15Sr, 6Jr , 6SO, 3Fr
is it appropriate to model 5 trials as independent, with the same probability of success on each trial? 
Explain. No. These trials are not independent.
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What other probability distribution would be more appropriate in this setting?
hypergeometric
P(X = 2Fr) = (3C2)(27C2)/(30C5)