Two percent of the parts produced by a machine are defective. Twenty parts are selected at random. Use the binomial probability tables to answer the following questions. a. What is the probability that exactly 3 parts will be defective? b. What is the probability that the number of defective parts will be more than 2 but fewer than 6? c. What is the probability that fewer than 4 parts will be defective?

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.