Find the probability of sample proportion

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Reference no: EM131455810

Question: Roper ASW conducted a survey to learn about American adults' attitudes toward money and happiness (Money October 2003). Fifty-six percent of the respondents said they balance their checkbook at least once a month.

a. Suppose a sample of 400 American adults were taken. Show the sampling distribution of the proportion of adults who balance their checkbook at least once a month.

b. What is the probability that the sample proportion will be within ±.02 of the population proportion?

c. What is the probability that the sample proportion will be within ±.04 of the population proportion?

Reference no: EM131455810

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