Question

1. (10 points) The following regression output is available. Notice that some of the values are missing.

   Predictor         Coef      SE Coef      T          P

   Constant           5.932      2.558       2.320    0.068

     x                    0.511                       6.083    0.001

Analysis of Variance

Source                         DF          SS        MS            F        P

Regression                            648.72    648.72    57.20   0.001

Residual Error                       56.70      

Total                            16      705.43

Based on the information given, what is the value of sum of squares of the X’s (SSxx)?

1. 7626.92      
2. 23.142
3. 535.591
4. None of the above

1. (10 points) Consider the following partially completed computer printout for a regression analysis Based on the information provided, which of the following statements is true at a level of significance or 1 %? Regression Analysis Regression Statistics Multiple R R Square Standard Error Observations ANOVA SS MS 331160 Regression Residual Total 331160 162112 493272 t Stat Coeff. 50.8410 St. Error 246.9869 P-value 0.8381396 0.2058 Intercept Hard Drive Capacity - 217.7539 26.1286 0.000995 B. Th A. The regression model explains 81.9% of the total variation around the mean value of the dependent variable The correlation between the two variables is strong positive, and linear The regression slope coefficient is not significantly different from zero, and X is not a significant variable to explain Y D. None of the above is true.

Answer 1

pearl Page Page 0.511 2 A Given that f = 0.511 We know that speg = 8 ² ² ( x - x) 2 = Speg = 648.72 =) Sšar = 3. (x-) ? = 648-72 = 248437_ = sy = 49.8434 : None of the option matches the answer we will choose option D.. 1.) R² = 1- SSRES TSS = - 162112 = 0.6713 or67 13% 493272 i A is false as the model explains 67.13% of variation. - B is also falss as: - Ssny - 217.7539 o Su Sy 493272 Y = -0-31 c is also false because the povalne is equal to 0.000995 <0.01 , which implies X is significant. D none of the above is true. Spiral