A raw score from a sample may be converted to a standard score by.
A) $z = \frac { X - \mu } { \sigma }$
B) $z = \frac { X - \bar { X } } { S }$
C) $z = \frac { X - \bar { X } } { \sigma }$
D) $z = \frac { X - \bar { X } } { s }$

Question

A raw score from a sample may be converted to a standard score by. 
A) $z = \frac { X - \mu } { \sigma }$
B) $z = \frac { X - \bar { X } } { S }$
C) $z = \frac { X - \bar { X } } { \sigma }$
D) $z = \frac { X - \bar { X } } { s }$

Quizplus · Accepted Answer

The formula $z = \frac { X - \bar { X } } { S }$ is used to convert a raw score to a standard score (z-score) using the sample mean ($\bar{X}$) and sample standard deviation (S).

A Raw Score from a Sample May Be Converted to a Standard