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Performing Hypothesis Tests: Means
9. Hypothesis Testing for One Sample / Performing Hypothesis Tests: Means / Problem 3
Problem 3

A relationship study claims that 18%18\% of couples have initiated marriage counseling. A random sample of 400400 couples found that 8080 had initiated counseling. Construct a 95%95\% confidence interval for the population proportion and state whether the study's claim of 18%18\% is consistent with the sample data.