Question 12 This introduction applies to Problems 12 and 13. A simple linear relationship between the price and size of a home has ALREADY been found to be statistically significant. Since the amount of variation is still too large to make a practical confidence interval, the variable factor "type of home construction" (a nominal variable) is to be introduced into the model. Five types of home construction are of interest: brick, vinyl, stone, wood and steel. How many additional "factors" are to be introduced into the multivariate equation? A. 1 b. 10 Question 13 How many levels of the factor "type of home construction" (that is, how many dummy variables) will be introduced into the equation? A. 1 b. 4