Question

On a standardized exam, the scores are normally distributed with a mean of 190 anda standard deviation of 20. Find the z-score of a person who scored 155 on the exam.

Answer 1

How is this a good answer there is no answer?

Answer 2

Step 1

State an expression for the z-score

`z=(x-\mu)/(\sigma)`

Where

Step 2

Find the z-score when x = 155