A raw score of 82 coming from a distribution of scores with a mean of 76 and a standard of 4 is equal to a z score of:
A) +1.5.
B) -1.5.
C) +4.
D) -2.

Question

Quizplus · Accepted Answer

To find the z-score, we use the formula: 
z = (X - μ) / σ 
where X is the raw score, μ is the mean, and σ is the standard deviation. 
Plug in the values: 
z = (82 - 76) / 4 
z = 1.5 
Since the raw score is above the mean, the z-score is positive. 
Therefore, the answer is choice A: +1.5.

A Raw Score of 82 Coming from a Distribution of Scores