The peanut crop was harvested from five fields of various area. The following data are the mass of the crop from each field y (in kilograms) and the field area x (in hectares). y 7190 15540 13370 19720 13050 *| 2.03 4.04 3.48 3.98 3.08 Round your intermediate answers to four decimal places (e.g. 98.7654). (a) Fit the simple linear regression model using the method of least squares. Find the estimate of o?. Round your answer to the nearest integer (e.g. 9876). (b) What change in the mean mass is expected when the field area changes by 1 hectare? Round your answer to the nearest integer (e.g. 9876). (c) Calculate the fitted value of y corresponding to x = 3.98. Find the corresponding residual. Round your answer to the nearest integer (e.g. 9876). Round your answer to the nearest integer (e.g. 9876). (d) Estimate the mean mass of the crop harvested from 2.5 hectares. Round your answer to the nearest integer (e.g. 9876).

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