A medical researcher wants to determine the relationship between the price per dose of prescription drugs in the United States and the price of the same dose in Australia. The data are shown. Describe the relationship. This problem will be done manually. Round to three decimal places. 8) 3.31 3.16 2.27 3.13 2.54 1.98 2.22 US price (x) Australian price (y) 1.29 1.75 0.82 0.83 1.32 0.84 0.82 a) Compute the value of the correlation coefficient b) Test the significance of the correlation coefficient at alpha c) Determine the regression equation d) Predict y' for x 3.11, x 2.39, x 2.99, x 3.35 e) Find the 95% prediction interval for x 307
