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Historically, the proportion of students entering a university who finished in 4 years or less was...

Historically, the proportion of students entering a university who finished in 4 years or less was 60%. To test whether this proportion has decreased, 116 students were examined and 48% had finished in 4 years of less has statistically significantly decreased (at the 10% level of significance), what is the critical value?

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Answer #1

from above critical value =-1.282

as test statistic -2.64 is lower then critical value ; therefore we reject null hypothesis

and conclude that this proportion has decreased .

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