Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 86 people in the 18-21 age bracket and finds that 73 of them respond and 13 refuse to respond. When 285 people in the 22-29 age bracket are contacted, 258 respond and 27 refuse to respond. Assume that 1 of the 371 people is randomly selected. Find the probability of getting someone in the 22-29 age bracket or someone who agreed to respond.Report the answer as a percent rounded to one decimal place accuracy. You need not enter the "%" symbol.P(22-29 or agreed) =

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Asked Oct 19, 2019
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Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 86 people in the 18-21 age bracket and finds that 73 of them respond and 13 refuse to respond. When 285 people in the 22-29 age bracket are contacted, 258 respond and 27 refuse to respond. Assume that 1 of the 371 people is randomly selected. Find the probability of getting someone in the 22-29 age bracket or someone who agreed to respond.

Report the answer as a percent rounded to one decimal place accuracy. You need not enter the "%" symbol.

P(22-29 or agreed) =

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Expert Answer

Step 1

Given information can be tabulated as shown below.

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Age 18-21 22-29 Total Respondents Refusers Total 73 13 86 258 27 285 331 40 371

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Step 2

We are supposed to calculate probability of instances where contacted people were ...

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P(22-29 or Agreed) P(22-29) P(Agreed) P(22-29 and Agreed) 285 331 258 371 371 371 358 371 = 0.9649595687 =96.5%

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