In Statistics, The $z$ -Score Formula $z = \frac { x - \mu } { \sigma }$

Short Answer

In statistics, the $z$ -score formula $z = \frac { x - \mu } { \sigma }$ is used in studying probability.
a. Solve $z = \frac { x - \mu } { \sigma }$ for $x$ .
b. Find $x$ when $z = 2.5 , \mu = 80$ , and $\sigma = 20$