Student Advisors Are Interested in Determining If the Variances of the Grades

question 15

Essay

Student advisors are interested in determining if the variances of the grades of day students and night students are the same. The following samples are drawn: $$\begin{array} { l l } \text { Day } & \text { Night } \\n _ { 1 } = 25 & n _ { 2 } = 31 \\s _ { 1 } = 9.8 & s _ { 2 } = 14.7\end{array}$$ Test the equality of the variances of the populations at 95% confidence.

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