# Question

The model using 12 squared and interaction variables has the smallest s. However, if we desire a somewhat simpler model, note that s does not increase substantially until we move from a model having seven squared and interaction variables to a model having six such variables. Moreover, we might subjectively conclude that the s of 210.70 for the model using 7 squared and interaction variables is not that much larger than the s of 174.6 for the model using 12 squared and interaction variables. Using the fact that the unexplained variations for these respective models are 532,733.88 and 213,396.12, perform a partial F-test to assess whether at least one of the extra five squared and interaction variables is significant. If none of the five extra variables are significant, we might consider the simpler model to be best.

## Answer to relevant Questions

Below we list several variables. Which of these variables are quantitative and which are qualitative? Explain. a. The dollar amount on an accounts receivable invoice. b. The net profit for a company in 2013. c. The stock ...Consider the data in the page margin. a. Find the number of classes needed to construct a histogram. b. Find the class length. c. Define nonoverlapping classes for a frequency distribution. d. Tally the number of values ...Discuss how we use residual plots to check the regression assumptions for multiple regressions. Mendenhall and Sincich (1993) present data that can be used to investigate allegations of gender discrimination in the hiring practices of a particular firm. These data are given in the page margin. In this table, y is a ...Table in the page margin presents quarterly sales of the TRK-50 mountain bike for the previous 16 quarters at a bicycle shop in Switzerland. The time series plot under the sales data shows that the bike sales exhibit an ...Post your question

0