Suppose that 40% of Americans drink soda every day. Amy, a researcher at a local university, takes a random sample of 18 Americans. Let X represent the number of Americans in Amy's sample who drink soda every day. Let u and represent the parameters of a normal distribution and let n and p represent the parameters of a binomial distribution. The sampling distribution of X is exactly normal with μ = 7.2 and o = 2.078. | almost binomial with n = 18 and p = 0.4. exactly binomial with n = 18 and p = 0.4. approximately normal with μ = 0.4 and = 0.115.

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