A statistician is looking at the relationship between the explanatory variable of dosage of medication andthe response which is time to relief of pain. She believes there is a a linear association. If r squared is .87, then
A) 87% of the people who take the medication will experience relief.
B) 87% of the variance in time to relief is explained by the relationship to dosage of the medication.
C) The variables time to relief and dosage of medication are independent.
D) The change in dosage causes a change in the time to relief.