im stuck for time and i need these question asap!

(TCOs 6 and 8) Which of the following statements is most true with regard to regression lines? (Points : 5) They show cause-and-effect relationships. They are too complicated for most applications. They cannot be used with services. They describe relationships among variables. None of the above

Question 2. 2. (TCO 6) The primary purpose of the mean absolute deviation (MAD) in forecasting is to (Points : 5)

eliminate forecast errors. seasonally adjust the forecast. develop a correlation coefficient. adjust the trend line. None of the above

Question 3. 3. (TCO 8) The average of the squared differences between the forecasted and observed values is (Points : 5)

squared mean error (SME). mean absolute deviation (MAD). mean squared error (MSE). smoothing constant. None of the above

Question 4. 4. (TCO 8) Given forecast errors of -2, 4, 9, and -5, what is the mean absolute deviation? (Points : 5)

4 3 4 5 7

Question 5. 5. (TCO 8) A measure of variability around the regression line is (Points : 5)

coefficient of correlation. coefficient of determination. seasonal variations. None of the above

Question 6. 6. (TCOs 7 and 8) Less quantitative methods of forecasting tend to be used more for (Points : 5)

short-term forecasts. budget forecasts. random forecasts. economic forecasts. long-term forecasts