In 2003, the student body of a large university in Ontario consisted of 30% first-year students, 25% second-year students, 27% third-year students, and 18% graduate students. A sample of 400 students taken from the 2004 student body showed that there were 138 first-year students, 88 second-year students, 94 third-year students, and 80 graduate students. Test with 5% significance level to determine whether the student body proportions changed.

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The Answer of In 2003, the student body of a large university in Ontario consisted of 30% first-year students, 25% second-year students, 27% third-year students, and 18% graduate students. A sample of 400 students taken from the 2004 student body showed that there were 138 first-year students, 88 second-year students, 94 third-year students, and 80 graduate students. Test with 5% significance level to determine whether the student body proportions changed.

In 2003, the Student Body of a Large University in Ontario