Question

Intelligence quotients (IQ's) on the Standford-Binet intelligence test are normally distributed with a mean of 100 and a standard deviation of 16. Find the IQ score corresponding to a z-score of -2.25.

Answer 1

What part do you need help with?

Answer 2

Remember how to calculate Z-Scores?

Answer 3

Yes

Answer 4

\[Z = \frac{ x _{i} - \mu}{ \sigma }\]

Answer 5

So just plug in the values given to you in the problem and solve for "x"

Answer 6

Awesome thanks