A CBS News Poll15 asked the question "Compared to your parents' generation, do you think in general your opportunities to succeed in life are better than theirs, about the same as theirs, or worse than theirs?" on three separate dates over a 10-year period. All surveys involved n = 1048 individuals.

a. Is there a significant difference among the responses to this question over time? Use α = .05.
b. If significant differences are found in part a, describe the nature of these differences.

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Poll Dateetter Same Worse Unsure Totals December 2009 493 252 283 June 2007 February 2000 755 231 650 89 189 52 20 1048 TO 048