What is the significance of R and R2 in gression model?
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What is the significance of R and R2 in gression model?
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- A) A linear regression has a =6 and b=5 what is y predicted as when x=9? B) A linear regression has b=3 and a=4.What is the predicted Y for x=7?We are trying to predict Y using X1, X2 and X3. If we create a complete second order model with all interaction what is k, the degree of freedom for regression? Ο Κ=3 O K= 10 O K= 4 Ο Κ 11Prove OLS Estimator are independent of each other for the Multiple Linear Regression model
- Osteoporosis is a degenerative disease that primarily affects women over the age of 60. A research analyst wants to forecast sales of StrongBones, a prescription drug for treating this debilitating disease. She uses the model Sales = β0 + β1Population + β2Income + ε, where Sales refers to the sales of StrongBones (in $1,000,000s), Population is the number of women over the age of 60 (in millions), and Income is the average income of women over the age of 60 (in $1,000s). She collects data on 38 cities across the United States and obtains the following regression results: Coefficients StandardError t Stat p-Value Intercept 10.35 4.02 2.57 0.0199 Population 8.47 2.71 3.12 0.0062 Income 7.62 6.63 1.15 0.2661 a. What is the sample regression equation? (Enter your answers in millions rounded to 2 decimal places.) b-1. Interpret the coefficient of population. multiple choice 1 As the number of women over the age of 60 increases by 1 million, sales of StrongBones…Explain the term "Autoregressions"? Define The First-Order Autoregressive Model?Explain the Stationarity in the AR(1) Model?
- Find the least-squares regression line ŷ bo+ b₁z through the points For what value of is y = 0? H= (-2,0), (1, 6), (4, 14), (8, 19), (10, 27).Find the least-squares regression line ŷ =b0+b1x through the points (-2,2), (2,6), (5,13),(8,20),(10,24). For what value of x is ŷ =0? x =?Write down the formula of least square regression line?