14 of 21 (5 complete) HW Score: 19.05%, 4 of 2 Score: 0 of 1 pt 4.3.27 Question

Question

14 of 21 (5 complete) HW Score: 19.05%, 4 of 2 Score: 0 of 1 pt 4.3.27 Question Help The table below summarizes results from a study of people who refused to answer survey questions. If one of the subjects is randomly selected, what is the probability that the selected person refused to answer? Does the probability value suggest that refusals are a problem for pollsters? Age 22-29 256 40-49 137 50-59 60 and over 203 60 30-39 18-21 74 14 246 36 The probapility that a randomly selected person refused to answer is (Do not yiund unti the final answer. Then round to three decimal places as needed.) Enter your answer in the answer box and then click Check Answer cidAl

Explanation / Answer

from above:

a)

P(refused to answer)=200/1255=0.159

b)

P(60 and over and responded)=203/1255=0.162

c)

P(20-29 or respondend)=(279+1055-256)/1255=0.859

d)

P(responded or between 22 and 39)=(279+282+1055-256-246)/1255=0.888

Observed OBS 18-21 22-29 30-39 40-49 50-59 60 and over Total responded 74 256 246 137 139 203 1055 refused 14 23 36 29 38 60 200 Total 88 279 282 166 177 263 1255

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