Estimating the Binomial with the Normal Distribution · Exercise 22
A multiple choice test has a probability any question will be guesses correctly of 0.25. There are 100 questions, and a student guesses at all of them. Use the normal distribution to approximate the binomial distribution, and determine the probability at least 24, but no more than 28, questions will be guessed correctly.
OpenStax, Introductory Business Statistics 2e · §6.3 Estimating the Binomial with the Normal Distribution · Exercise 22
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