In July 1991 and again in April 2001, the Gallup Poll asked random samples of 1015 adults about their opinions on working parents. The table on the next page summarizes responses to the question Considering the needs of both parents and children, which of the following do you see as the ideal family in today s society?
a) Is this a survey, a retrospective study, a prospective study, or an experiment? Explain.
b) Will you test goodness-of-fit, homogeneity, or independence?
c) Based on these results, do you think there was a change in people's attitudes during the 10 years between these polls?