in 2020, the student body at a specific university in Cyprus consisted of 30% 1st year students, 25% 2nd year students, 27% 3rd year students, and 18% 4th year students. a sample of 400 students taken from the spring 2023 student body showed that there are 138 1st year, 88 2nd year, 94.3 3rd year and 80 final year. test with 5% significance level to determine whether the student body proportions have changed. thank you in advance!

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