A decade-old study found that the proportion, , of high school seniors who believed that "getting rich" was an important personal goal was 75% . A researcher decides to test whether or not that percentage still stands. He finds that, among the 220 high school seniors in his random sample, 181 believe that "getting rich" is an important goal. Can he conclude, at the 0.05 level of significance, that the proportion has indeed changed?

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