Exhibit 16-4 In a laboratory experiment, data were gathered on the life span (y in months) of 33 rats, units of daily protein intake (xS1U1B11S1U1B0), and whether or not agent xS1U1B12S1U1B0 (a proposed life extending agent) was added to the rats diet (xS1U1B12S1U1B0 = 0 if agent xS1U1B12S1U1B0 was not added, and xS1U1B12S1U1B0 = 1 if agent was added.) From the results of the experiment, the following regression model was developed. = 36 + 0.8xS1U1B11S1U1B0 - 1.7xS1U1B12S1U1B0 Also provided are SSR = 60 and SST = 180. -Refer to Exhibit 16-4. If we want to test for the significance of the model, the critical value of F at 95% confidence is

A) 8.62 B) 3.35 C) 2.92 D) 2.96 A) 8.62 B) 3.35 C) 2.92 D) 2.96 C

Exhibit 16-4 In a laboratory experiment, data were gathered on the life span (y in months) of 33 rats, units of daily protein intake (xS1U1B11S1U1B0), and whether or not agent xS1U1B12S1U1B0 (a proposed life extending agent) was added to the rats diet (xS1U1B12S1U1B0 = 0 if agent xS1U1B12S1U1B0 was not added, and xS1U1B12S1U1B0 = 1 if agent was added.) From the results of the experiment, the following regression model was developed. = 36 + 0.8xS1U1B11S1U1B0 - 1.7xS1U1B12S1U1B0 Also provided are SSR = 60 and SST = 180. -Refer to Exhibit 16-4. The test statistic for testing the significance of the model is

A) 0.50 B) 5.00 C) 0.25 D) 0.33 A) 0.50 B) 5.00 C) 0.25 D) 0.33

The following model y = $\beta$0 + $\beta$1x1 + $\varepsilon$ Is referred to as a

A) curvilinear model B) curvilinear model with one predictor variable C) simple second-order model with one predictor variable D) simple first-order model with one predictor variable A) curvilinear model B) curvilinear model with one predictor variable C) simple second-order model with one predictor variable D) simple first-order model with one predictor variable

Exhibit 16-4 In a laboratory experiment, data were gathered on the life span (y in months) of 33 rats, units of daily protein intake (xS1U1B11S1U1B0), and whether or not agent xS1U1B12S1U1B0 (a proposed life extending agent) was added to the rats diet (xS1U1B12S1U1B0 = 0 if agent xS1U1B12S1U1B0 was not added, and xS1U1B12S1U1B0 = 1 if agent was added.) From the results of the experiment, the following regression model was developed. = 36 + 0.8xS1U1B11S1U1B0 - 1.7xS1U1B12S1U1B0 Also provided are SSR = 60 and SST = 180. -Refer to Exhibit 16-4. The multiple coefficient of determination is

A) 0.2 B) 0.5 C) 0.333 D) 5 A) 0.2 B) 0.5 C) 0.333 D) 5

Exhibit 16-1 In a regression analysis involving 25 observations, the following estimated regression equation was developed. = 10 - 18xS1U1B11S1U1B0 + 3xS1U1B12S1U1B0 + 14xS1U1B13S1U1B0 Also, the following standard errors and the sum of squares were obtained.SS1U1B1b1S1U1B0 = 3 SS1U1B1b2S1U1B0 = 6 SS1U1B1b3S1U1B0 = 7 SST = 4,800 SSE = 1,296 -Refer to Exhibit 16-1. The test statistic for testing the significance of the model is

A) 0.730 B) 18.926 C) 3.703 D) 1.369 A) 0.730 B) 18.926 C) 3.703 D) 1.369

Exhibit 16-1 In a regression analysis involving 25 observations, the following estimated regression equation was developed. = 10 - 18xS1U1B11S1U1B0 + 3xS1U1B12S1U1B0 + 14xS1U1B13S1U1B0 Also, the following standard errors and the sum of squares were obtained.SS1U1B1b1S1U1B0 = 3 SS1U1B1b2S1U1B0 = 6 SS1U1B1b3S1U1B0 = 7 SST = 4,800 SSE = 1,296 -Refer to Exhibit 16-1. The coefficient of x3

A) is significant B) is not significant C) cannot be tested, because not enough information is provided D) None of these alternatives is correct. A) is significant B) is not significant C) cannot be tested, because not enough information is provided D) None of these alternatives is correct.