Question

For a normal distribution, it is known that the mean is zero and the standard deviation is 1Be sure to draw and label a normal distribution for each problem. Find the probability that a z score is above 1.68.

Answer 1

`\begin{gathered} Z=(X-\mu)/(\sigma) \\ Z=1.68 \\ so\colon \\ 1.68=(X-0)/(1) \\ so\colon \\ X=1.68 \\ P(X>1.68)\approx0.0465 \end{gathered}`

0.0465 or 4.65%