Statistics

A. A group of people were asked if they had run a red light in the last year. 147 responded "yes", and 345 responded "no". Find the probability that if a person is chosen at random, they have run a red light in the last year. Give your answer as a fraction or decimal accurate to at least 3 decimal places. B. A poll showed that 43.1% of Americans say they believe that some people see the future in their dreams. What is the probability of randomly selecting someone who does not believe that some people see the future in their dreams. Round to 3 decimal places. C. 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. b e . w t t i 0 e r I r l S e Rep" 38 1 4 lican a 4 4 Dance 12 3 1 rat 7 3 1 none 21 9 1 0 1 8 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: PlDemocrat) = thorse] = P(worse| Democrat) = PlDemocrat lworse) = PlDemocrat and worse) = 'L