Question

7) Compute the least-squares regression equation for the given data set. Use a TI- 84 calculator. Round the slope and y -intercept to at least four decimal places. x 44 38 16 20 25 38 19 y 73 68 24 30 43 66 33 Send data to Excel Regression line equation: = y

8) Price of eggs and milk: The following table presents the average price in dollars for a dozen eggs and a gallon of milk for each month from January through October 2003 . Dozen Eggs Gallon of Milk 2.20 3.24 1.19 3.20 1.93 3.07 1.37 3.21 1.52 3.18 0.98 2.98 0.99 3.02 1.77 3.13 1.26 2.73 1.77 2.99 Send data to Excel. Part: 0 / 3 0 of 3 Parts Complete Part 1 of 3 Compute the least-squares regression line for predicting the price of milk from the price of eggs. Round the slope and y -intercept to at least four decimal places. Regression line equation: = y

9) Interpreting technology: The following display from the TI- 84 Plus calculator presents the least-squares regression line for predicting the price of a certain stock y from the prime interest rate in percent x . LinReg = y + a bx = a 1.75752504 = b 0.32233465 = r 2 0.4604299939 = r 0.67854992 Part: 0 / 3 0 of 3 Parts Complete Part 1 of 3 Write the equation of the least-squares regression line. Use the full accuracy shown in the Excel output (do not round your answers). Regression line equation: = y 9)

Answer 1

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