PSY 555 Homework 14

Chapter 9: #10,11,13,14,15,16,18

1. What interpretations can you make from r-squared?

2. A scientist wants to show that driving after drinking alcohol causes accidents. To do this, she decides to examine records of the blood alcohol content (BAC) of 100 drivers who caused accidents. She finds there to be a significant relation between high blood alcohol levels and accidents (r=.80). What are the pros and cons of this study?