n a survey of 2000 adults, 18 years old and older, the following question was as
ID: 3366626 • Letter: N
Question
n a survey of 2000 adults, 18 years old and older, the following question was asked: Is your family income keeping pace with the cost of living? The results of the survey follow. (Enter your answers to three decimal places.)
(a) According to the survey, what is the probability that a random person polled said their family income is at least keeping pace with the cost of living?
(b) According to the survey, what is the probability that a random person polled said their family income is falling behind the cost of living?
behind Staying
even Increasing
faster Don't
know Respondents 800 870 250 80
Explanation / Answer
Solution:
Total number of respondants = 2000
( a )
probability that a person said their family income is at least keeping pace with the cost of living = (870+250)/2000
= 1120/2000
= 0.56
( b )
probability that a person polled said their family income is falling behind the cost of living = 800 / 2000
= 0.4
Answer falling behind staying even increasing faster don't know total respondents 800 870 250 80 2000Related Questions
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