on a standardized exam, the scores are normally distributed with a mean of 300 and a standard deviation of…
on a standardized exam, the scores are normally distributed with a mean of 300 and a standard deviation of 20. find the z - score of a person who scored 308 on the exam.
Answer
Answer:
$0.4$
Explanation:
Step1: Recall z - score formula
$z=\frac{x-\mu}{\sigma}$
Step2: Identify values
$x = 308$, $\mu=300$, $\sigma = 20$
Step3: Substitute values
$z=\frac{308 - 300}{20}=\frac{8}{20}=0.4$