Question

4. Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and standard deviation of 4.

If Andrew scored 45 on this test. What is his Z score?

Answer 1

his z score is 0.

\[z = \frac{X - \mu}{\sigma}\]

in your question X = 45 mean = 45 SD = 4

so

\[z = \frac{45 -45}{4} = 0\]