A Smaller Standard Deviation of a Normal Distribution Indicates That

Short Answer

A smaller standard deviation of a normal distribution indicates that the distribution becomes: $\begin{array}{|l|l|}\hline A&\text { more skewed to the left.}\\\hline B&\text {flatter and wider. }\\\hline C&\text { narrower and more peaked.}\\\hline D&\text { symmetrical.}\\\hline \end{array}$