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Normal Approximation to the Binomial Distribution Question

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Wize University Statistics Textbook > Continuous Probability Distributions

Normal Approximation to Binomial

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Half of the population can swim. There is a 1:3 odd that more than p^\hat{p}% of my sample of 50 can swim. Find p^.\hat{p}.
More Normal Approximation to Binomial Questions:
Normal Approximation and Binomial
About 70% of people have tried online dating.
a) If we randomly select 100 people, can we approximate a normal distribution?
b) What is the probability that at least 80 of the 100 have tried online dating?
Normal Approximation to the Binomial Distribution Question
Charles did not study for his exam, which has 40 multiple-choice questions. Each question has four answer choices – one being correct. He needs 50% to pass. If he randomly fills out the bubble sheet, what is the probability that he will pass the exam?
a) Normal Method:
b) Binomial method: