Answer: Ron's z-score is +1.2.
B. 1.2 standard deviation above the mean .
Step-by-step explanation:
Let X deontes the scores of the final exam
Given : Ms. Meyer's statistics class follow a normal distribution with Mean = 82
standard deviation =5.1
Formula : [tex]z=\dfrac{X-Mean}{Standard \ deviation}[/tex]
Ron scored 88 on the final.
So, put x=88
[tex]z=\dfrac{88-82}{5.1}=\dfrac{6}{5.1}\approx1.2[/tex]
Ron's z-score is +1.2.
Also, 88= 86+(1.2 x 5.1) = Mean +1.2 x (standard deviation)
i.e. This means that Ron's final score is 1.2 standard deviation above the mean .