0/10 pts Pollsters are concerned about declining levels of cooperation among per

Question

0/10 pts Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 91 people in the 18-21 age bracket and finds that 77 of them respond and 14 refuse to respond. When 265 people in the 22-29 age bracket are contacted, 237 respond and 28 refuse to respond. Assume that 1 of the 356 people is randomly selected. Find the probability of getting someone in the 22-29 age bracket or someone who agreed to respond. Write your answer as a decimal rounded to the third.

Explanation / Answer

The Contingency table is given below:

The probability of getting someone in the 22-29 age bracket or someone who agreed to respond is

= P(22-29 age bracket) +P(someone who agreed to respond) - P(22-29 age , responded)

= (265+314-237)/356 =342/356 =0.961

Answer: Prob. = 0.961

Age Responded Refuses Toatl 18-21 77 14 91 22-29 237 28 265 Total 314 42 356

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