Which of the following is the z-score equation for the ith observation?
A) zt = $\begin{array} { l }
\sqrt\frac { x _ { i } - \bar { x } } { s ^ { 2 } } \
\frac { x _ { i } - \bar { x } } { s }
\end{array}$
B) zi =
C) z1= $\left( x _ { i } - \bar { x } \right) S$
D) zi = $\frac { x _ { j } } { s \left( x _ { i } - \bar { x } \right) }$

Question

Which of the following is the z-score equation for the ith observation?
A) zt = $\begin{array} { l } 
\sqrt\frac { x _ { i } - \bar { x } } { s ^ { 2 } } \
\frac { x _ { i } - \bar { x } } { s }
\end{array}$
B) zi =
C) z1= $\left( x _ { i } - \bar { x } \right) S$
D) zi = $\frac { x _ { j } } { s \left( x _ { i } - \bar { x } \right) }$

Quizplus · Accepted Answer

The correct z-score equation for the ith observation is given by $zi = \frac { x _ { i } - \bar { x } } { s }$, where $x_i$ is the ith observation, $\bar{x}$ is the mean of the dataset, and $s$ is the standard deviation of the dataset. This formula standardizes an observation relative to the mean and standard deviation of the dataset it comes from.

Which of the Following Is the Z-Score Equation for the Ith