The Degrees of Freedom in a Chi-Squared Test for Normality

Short Answer

The degrees of freedom in a chi-squared test for normality, where the number of standardised intervals is 13 and there are 2 population parameters to be estimated from the data, is equal to: $\begin{array}{|l|l|}\hline\text { A. } & 13 . \\\hline \text { B. } & 10 \\\hline \text { C. } & 11 \\\hline \text { D. } & 2 . \\\hline\end{array}$