Roper ASW conducted a survey to learn about American adults’ attitudes toward money and happiness ( October ). Fifty-six percent of the respondents said they balance their checkbook at least once a month.
What is the probability that the sample proportion will be within of the population proportion?
- = Sample size = 400
- = Population proportion = 56% = 0.56
In this exercise, we determine the probability or equivalently .
What is the probability distribution of ?