A survey report states that 41% of adults visit their doctor regularly. Suppose that 12 adults are selected at random. a) Let X represents the number of adults visit their doctor regularly. Is X a binomial? b) What is the probability that exactly 4 adults visit their doctor regularly in such group? c) Find the mean and standard deviation for the number of adults that visit their doctor regularly in such group of 12 adults. d) Is it unusual to have 8 or more adults that visit their doctor regularly in such group of 12 adults? Explain.
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Since there are a fixed number of trials (12 adults), each trial has two possible outcomes (visiting or not visiting the doctor regularly), the trials are independent, and the probability of success (visiting the doctor regularly) is constant (41%), X is a Show more…
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