Opinion-polling organizations sometimes contact their respondents by sampling random telephone numbers.Assume that interviewers can now reach about 77% of Canadian households,while the percentage of those contacted who agree to cooperate with the survey is 39%.Each household,of course,is independent of the others.What is the probability of obtaining an interview with the next household on the sample list?

A) 0.300
B) 0.090
C) 0.770
D) 0.470
E) 0.140

Question

Chris Pitts · Accepted Answer

Final Answer : A, Explanation :  The probability of obtaining an interview is the product of the probability of reaching a household (77% or 0.77) and the probability of the household agreeing to cooperate (39% or 0.39). Thus, 0.77 * 0.39 = 0.3003, which rounds to 0.300.

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