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stats20

# stats20 - The table below presents the joint distribution...

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Unformatted text preview: The table below presents the joint distribution of computer crashes (M) and computer age (A): ———— A=0 (old) A=1 (new) What is E(A]M=0)? In the language of government statistics, you are “in the labor force” if you are available for work and either working or actively seeking work. The unemployment rate is the proportion of the labor force (not of the entire population) who are unemployed. Here are data from a government survey for the civilian population 25 years of age and over: Highest education Total Population In labor force Not ﬁnish HS 32,000 14,000 12,000 62,000 40,000 38,000 Some college, no 44,000 38,000 ‘ 36,000 college degree College degree 54,000 42,000 40,000 ! 26,000 Let A be the event that a randomly selected person from this sample has a college degree, and let B be the event that a randomly selected person from this sample is employed. What is P(A|B) (rounded to two decimal places)? A college decides to admit 1300 students. Pa’st experience shows that 80% of the students admitted will accept, Assuming that students make their decisions independently, the number who accept has the B(l300, 0.8) distribution. Round the standard deviation of the number'X of students who accept to ﬁve decimal places. Using that rounded number, what is the probability that morethan 1050 accept? (Use a z-score that actually appears in Table A. Round your ﬁnal answer to four decimal places. Remember to express your answer'as a proportion.) ‘ ...
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