Statistics

Question 6 A CBS News poll conducted June 10 and 11, 2006, among a nationwide random sample of 651 adults, asked those adults about their party affiliation (Democrat, Republican or none) and their opinion of how the US economy was changing ("getting better," "getting worse" or "about the same"). The results are shown in the table below. better same worse Republican 38 104 Democrat 12 87 137 none 21 90 118 Express your answers as a decimal and round to the nearest 0.001 (in other words, type 0.123, not 12.3% or 0.123456). If we randomly select one of the adults who participated in this study, compute: P(affiliated with neither party) = P(better) = P(better | affiliated with neither party) = P(affiliated with neither party | better) = P(affiliated with neither party and better) = . Question 7 43% of all Californians registered voters prefer life in prison without parole over the death penalty for a person convicted of first-degree murder. Among Latino California registered voters, 35.6% prefer life in prison without parole over the death penalty for a person convicted of first-degree murder. 27% of all Californians are Latino. These preferences are summarized in the contingency table below: Latino Non-Latino Total Prefer Life Sentence 0.15308 0.27692 0.43 Prefer Death Penalty 0.11692 0.45308 0.57 Total 0.27 0.73 Suppose that one Californian is randomly selected. Round your answers to parts a) and b) to two decimal places. a) What is P(C) ? b) What is P(C | L) ? c) Are C and L independent events? O No, because P(C) and P(C| L) are not equal. O Yes, because P(C) and P(C | L) are equal