MCQ
Which of the following is probability density function for standard normal variable?
- A$f(z)=e^{-\frac{1}{2} z^2} ;-\infty < z < \infty$
- B$f(z)=\frac{1}{\sqrt{2 \pi}} e^{-\frac{1}{2} z^2} ;-\infty < z < \infty$
- C$f(z)=\frac{1}{\sqrt{2 \pi}} e^{-\frac{1}{2} z^2} ; 0 < z <\infty$
- ✓$f(z)=\frac{1}{\sqrt{2 \pi}} e^{-\frac{1}{2} z^2} ;-\infty < z < \infty$