Identify the formula used to calculate z-score.
A) (Mean − Value)/Standard Deviation
B) (Mean − Value)/(Mean + Value)
C) (Value − Mean)/Standard Deviation
D) (Value − Mean)/Median

Question

Quizplus · Accepted Answer

The formula for calculating z-score is (Value − Mean)/Standard Deviation. This involves subtracting the mean from the value in question and then dividing by the standard deviation. Option A is the reverse of the correct formula and Option B involves adding the mean to the value in question, which is not necessary for calculating z-score. Option D is incorrect because z-score is calculated using the standard deviation, not the median.

Identify the Formula Used to Calculate Z-Score