Which of the Following Is the Most Common Null Hypothesis

Short Answer

Which of the following is the most common null hypothesis used when testing for equality of two population variances? $\begin{array}{|l|l|}\hline \text { A } & \text { Ho: } \sigma_{1} 2 / \sigma_{2}^{2}>1 \\\hline \text { B } & \text { Ho: } \sigma_{1}^{2} / \sigma_{2}^{2}<1 \\\hline \text { C } & \text { Ho: } \sigma_{1}^{2} / \sigma_{2}^{2}=1\\\hline D.&\text { None of these choices are correct. }\\\hline \end{array}$