Question

Read the following description of a data set. A pharmaceutical company is testing a new headache medication. Researchers at the company conducted an observational study using volunteer participants. All participants were given a supply of tablets of the new medication. The participants then recorded how many headaches they had had for a week, x, and how many tablets they had taken, y. The least squares regression line of this data set is: y=0.641x–0.417 Complete the following sentence: For each additional headache someone had had, the least squares regression line predicts that he or she would have taken additional tablets.

Answer 1

For each additional headache someone had had, the least squares regression line predicts that he or she would have taken approximately 0.641 additional tablets.