Question
A health policy economist interested in investigating the relationship between the cost of prescription drugs in Canada and the cost of prescription drugs in the
A health policy economist interested in investigating the relationship between the cost of prescription drugs in Canada and the cost of prescription drugs in the United States has information from a random sample of45 prescription drugs sold in both countries. For each of these drugs, the economist is examining two pieces of information: the average cost x (in Canadian dollars) of a one-month supply of the drug in Canada, and the average cost y (in U.S. dollars) of a one-month supply of the drug in the United States. Using computer software, the economist finds that, for the sample of drugs examined, the least-squares regression equation relating x and y is y=?0.61+ 0.72x. The economist also notices from the software that the standard error of the slope of the least-squares regression line is approximately 0.25.Test for a significant linear relationship between x and y by doing a hypothesis test regarding the population slope ?1. (Assume that the variable y follows a normal distribution for each value of x and that the other regression assumptions are satisfied.) Use the0.10 level of significance, and perform a two-tailed test. Then complete the parts below.
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