Crammers Rule Q1. Use Crammer’s rule to find the solution to…

Crammers Rule Q1. Use Crammer’s rule to find the solution to the following augmented matrix. Show your work, and clearly circle the values of the determinate of the coefficient matrix D, then that of , and   Please note I am using the notation given in Instructor Video. Using Cramer’s rule to solve a 3×3 system  

The average cost (COST) of heating a home is a function of o…

The average cost (COST) of heating a home is a function of outside Temperature (TEMP), thickness of Insulation (INSUL) and Age of furnace (AGE). Data is collected on these variables and a regression analysis is done on the data. An incomplete MS Excel output is shown below.   Regression Statistics         Multiple R           R Square           Adjusted R Square           Standard Error           Observations                        ANOVA             df SS MS F Signifcance F Regression   171220       Residual           Total 19 212916                     Coefficients Standard Error t Stat P-Value Lower 95% Intercept 427 59.6 7.17     TEMPT (X1)   0.7723 -5.93     INSUL (X2) -14.8 4.754       AGE (X3) 11.1 4.012         The sample size is