Question

Let x be per capital income in thousands of dollars. Let y be the number of medical doctors per 10,000 residents. Six small cities in Oregon gave the following information about x and y. x 8.9 9.5 10.5 8.0 8.3 8.7 y 9.8 18.4 21.8 10.2 11.4 13.1 Complete parts (a) through (e), given Σx = 53.9, Σy = 84.7, Σx2 = 488.29, Σy2 = 1315.45, Σxy = 781.11, and r ≈ 0.914. (a) Draw a scatter diagram displaying the data. Submission Data Correct: Your answer is correct. (b) Verify the given sums Σx, Σy, Σx2, Σy2, Σxy, and the value of the sample correlation coefficient r. (Round your value for r to three decimal places.) Σx = Σy = Σx2 = Σy2 = Σxy = r = (c) Find x, and y. Then find the equation of the least-squares line y hat = a + bx. (Round your answers for x and y to two decimal places. Round your answers for a and b to three decimal places.) x = y = y hat = + x

Answer 1