Answer to Question #264043 in Statistics and Probability for Dos

Question

The mean grade in a Physics examination was 75 and the standard deviation was 5. Determine the standard scores (z-value) corresponding to a grade of 85

Answer 1

$\mu=75 \\ \sigma = 5 \\ x = 85 \\ Z = \frac{x - \mu}{\sigma} = \frac{85-75}{5} = 2$