Chapter 10.5, Problem 62E

To graph Problems 59-62, use a graphing calculator and refer to the normal probability distribution function with mean $\mu$ and standard deviation $\sigma :$

$f\left(x\right)=\frac{1}{\sigma \sqrt{2\pi }}{e}^{-\left(x-\mu \right)}{}^{{}^2/2{\sigma }^2}$

Graph equation (1) with $\mu =18$ and

(A) $\sigma =3$

(B) $\sigma =6$

Graph both in the same viewing window with

$\text{Xmin}=0,\text{ X}\max =40,\text{ Y}\min =0,\text{ and Y}\max =0.2$