Question

*You will use the following scenario forquestions 1-4*On the Wechsler Adult IntelligenceScale a mean IQ is 100 with a standarddeviation of 15. You may assume thatIQ scores follow a normal distribution.What percent of people have an IQscore between a 90 and 115?*Write your answer as a percent andround to 2 decimal places

Answer 1

Given

The mean is 100, and the standard deviation is 15.

To find the percent of people having an IQ score between 90 and 115.

Explanation:

It is given that,

The mean is 100, and the standard deviation is 15.

That implies,

$\begin{gathered} P(90Therefore, the percent is,[tex]\begin{gathered} Percent\text{ }of\text{ }people=0.59\times100 \\ =59\% \end{gathered}$

Hence, the percent of people having an IQ score between 90 and 115 is 59%.