Question

The mean Exam score on the SOC 15 Exam 2 is 84.28 with a standard deviation of 6.71.Your friend scored an 86 on the exam. What is your friend's z-score?

Answer 1

Answer:

z-score = 0.256

Step-by-step explanation:

The mean score, μ = 84.28

The standard deviation, σ = 6.71

The score, X = 86

The z-score is calculated using the formula:

`\begin{gathered} z-\text{score = }(X-\mu)/(\sigma) \\ z-\text{score = }(86-84.28)/(6.71) \\ z-\text{score = }(1.72)/(6.71) \\ z-\text{score = }0.256 \end{gathered}`

Therefore, your friend's z-score = 0.256