On an exam,Tom scored 12 points above the mean and had a z-score of +2.00.The standard deviation for the set of exam scores must be s = 6.

Question

Quizplus · Accepted Answer

The formula for calculating a z-score is given by (x - mean) / standard deviation = z. 
Given that Tom's z-score is +2.00 and he scored 12 points above the mean, we can write the equation using the values: 
(12 / s) = 2.00. 
Solving for s, we get s = 6. 
Therefore, the statement is true.

On an Exam,Tom Scored 12 Points Above the Mean and Had