PBS News Hour reported in 2014 that 39.4% of Americans between the ages of 25 and 64 have at least a two-year college degree.† Assume that 55 Americans between the ages of 25 and 64 are selected randomly. (a)What is the expected number of people with at least a two-year college-degree?   (b)What are the variance and standard deviation for the number of people with at least a two-year college degree? (Round your answers to four decimal places.) variance standard deviation

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A: n1 = 4620 n2 = 6228 x1 = 3.8 x2 = 2.4 s1 = 6.7 s2 = 4.6

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A:

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A: Note: Thank you for the question. Since multiple sub parts are posted, according to our policy, we…

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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.