Illinois Department of Transportation (IDOT) wants to know what factors determine roads condition. IDOT hired an engineering firm to Which of the following is not true regarding exponential smoothing? perform the analysis. The road condition is measured as cracking index (takes the value from 1 to 100). The firm believes that the condition might be explained with the following factors: age (years), traffic (number of cars per minute) and type of the road (interstate, Select one: state highway or county highway). What is the appropriate population model to be estimated? O a. The smoothing constant is bounded between 0 and 1. O b. Removes random variation in the data. Select one: O a. cracking = Bo+ 1*age+ B2*traffic+ 3*[(interstate)+ B4*I(statehway)+ B*I(countyhway)+ O c. As the smoothing constant (w) approaches 1, the series becomes smoother. O b. cracking = Bo+By* age + B2 * traffic + B3 * I(interstate) + B4 * I(statehway) + O d. Considers all the data available at t (tt-1 , tt-2.). O c. cracking = Bo+ 1* age + B2* I(traffic) + 83* I(interstate) + & O d. cracking = bo + by * age + b2* traffic + b3* I(interstate) + by* I(statehway) + O e. Provides smoothed values for all the time periods observed. O e. cracking = bo+ b1* age + b2* I(traffic) + b3* I(interstate) + b4* I(countyhway) Suppose a sales manager wanted to use a linear regression model to predict sales based solely on the month of the year. Which of the following specifications should she use? Select one: O a. A single month variable, equal to 1 if the month is January, 2 if the month is February, ..., and 12 if the month is December O b. A single month variable, equal to 1 if the month is January, 2 if the month is February, ..., 11 if the month is November, and 0 if the month is December O c. Twelve month variables, with the first equal to 1 if the month is January and 0 otherwise, the second equal to 1 if the month is February and 0 otherwise, ..., and the twelfth equal to 1 if the month is December and 0 otherwise. O d. Eleven month variables, with the first equal to 1 if the month is January and 0 otherwise, the second equal to 1 if the month is February and 0 otherwise, ..., and the eleventh equal to 1 if the month is November and 0 otherwise