A Variable X Has the Possible Observations Shown Below $\text { Possible observations of } \mathrm{x}$

Multiple Choice

A variable x has the possible observations shown below.
$\text { Possible observations of } \mathrm{x}$ : -3 -1 0 1 1 2 4 4 5
Determine the standardized version of $x$ .
Round the values of $\mu$ and $\sigma$ to one decimal place.

A) $z = \frac { x - 1.4 } { 2.6 }$
B) $x = \frac { z - 1.4 } { 2.6 }$
C) ${ z } = \frac { \mathrm { x } - 1.4 } { 2.5 }$
D) $z = \frac { x - 2.5 } { 1.4 }$