Pollsters are concerned about declining levels of cooperation among persons cont
ID: 3376247 • Letter: P
Question
Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 79 people in the 18-21 age bracket and finds that 44 of them respond and 35 refuse to respond. When 273 people in the 22-29 age bracket are contacted, 244 respond and 29 refuse to respond. Suppose that one of the 352 people is randomly selected. Find the probability of getting someone in the 22-29 age bracket or someone who refused to respond P(person is in the 22-29 age bracket or refused to respond)- (Do not round until the final answer. Then round to three decimal places as needed.)Explanation / Answer
P(getting someone in the 22-29 age bracket or someone who refused to respond) = P(getting someone in the 22-29 age bracket) + P(getting someone who refused to respond) - P(getting someone in the 22-29 age bracket and refused to respond)
= 273/352 + (35+29)/352 - 29/352
= 308/352
= 0.875 (ans)