Question 1004500: Hi, I just started to learn Data analysis and i am bad in math honestly. Please help to answer the below question, thanks
John has to get 40% correct answer of 30 Questions of multiple-choice (1 out of 4 answers) What distribution to model the probability of achieving pass, Explain my choice of distribution and show how it could be used by calculating the probability of getting pass.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! John has to get 40% correct answer of 30 Questions of multiple-choice (1 out of 4 answers)
Comment:: 0.40*30 = 12 questions correct
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What distribution to model the probability of achieving pass?
Ans: Binomial distribution with n = 30 and p(correct) = 1/4
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, Explain my choice of distribution and show how it could be used by calculating the probability of getting pass.
P(pass) = P(x >= 12) = 1 - binomcdf(30,0.25,11) = 0.0507
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Cheers,
Stan H.
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