Question 7.78

48. At a college in Singapore, students were randomly selected and asked to complete a Web-based survey about sexual behavior. Of those selected, 534 students completed the survey. Suppose that the population proportion of those having had sexual intercourse in the past six months was .

  1. What are the mean and standard deviation of the proportion of the sample who have had sexual intercourse over the past six months?
  2. In what interval of values do the proportions from 95% of all samples fall?
  3. In what interval of values do the proportions from 99.7% of all samples fall?