Question

Write down what you entered into your calculator along with your answer. Drawing a standard normal curve and shading the area just like we did in class can help you answer the following questions.

1. Some IQ tests are standardized to a Normal model, with a mean of 100 and a standard deviation of 15.

a) What cutoff value bounds the highest 5% of all IQs?

b) What’s the IQR of the IQ’s? For full credit, you need to show work that explains how you got your answer.

Answer 1