Formula
[tex]\begin{gathered} Z=\text{ }\frac{x-\mu}{\sigma} \\ \text{Where} \\ Z=standardscore \\ x=observedvalue \\ \mu=meanofthesample \\ \sigma=standarddeviationofthesample \\ Z=\text{ }\frac{3.5-4}{1.6} \\ Z=-0.3125 \\ \\ \\ Z=\text{ }\frac{5.5-4}{1.6} \\ Z=0.9375 \end{gathered}[/tex]Z=standard score
x=observed value
u=mean of the sample
standard deviation of the sample
