At a college, the average number of hours students play video games is 3 hours per week with a standard deviation of 3. What is the z-score for Red-Eyed Randy, a student at this college who plays video games 30 hours per week?
A) 3
B) 6
C) 9
D) 30

Question

Quizplus · Accepted Answer

To find the z-score, we use the formula:
z = (x - µ) / σ
Where x is the value we want to convert to a z-score (in this case, 30), µ is the population mean (3), and σ is the population standard deviation (3).
z = (30 - 3) / 3 = 9
Therefore, Red-Eyed Randy's z-score is 9.

At a College, the Average Number of Hours Students Play