Normal Curve Approximation
A 56-question multiple choice test has 4 possible answers for each question and a student chooses the answers to each problem at random. A student selects 16 correct answers. Find the probability of the result using the normal curve approximation to the binomial distribution.© SolutionLibrary Inc. solutionlibary.com 9836dcf9d7 https://solutionlibrary.com/statistics/descriptive-statistics/normal-curve-approximation-384
... guessing wrong=3/4
Prob(getting m right) = (n!/((n-m)!m!)) p^m q^(n-m)
Where in our case we get:
(56!/(40!16!))x(1/4)^16 x (3/4)^40
The Gaussian approximation ...