Question

In: Statistics and Probability

A measure of goodness of fit for the estimated regression equation is the Question 5 options:...

A measure of goodness of fit for the estimated regression equation is the

Question 5 options:

sample size

mean square due to regression

mean square due to error

multiple coefficient of determination

Solutions

Expert Solution

The answer is multiple coefficient of determination.

The coefficient of determination is a measure of explanatory power of regression and is defined as the ratio of variation explained by regression to the total variation or in other words it is the proportion of variation explained by regression. It is calculated as

IF the value of is close to 1, variation is explained by regression and the regression fitted is "good".

If the value of is close to zero, no variation is explained by regression and the fitted model can not be used for prediction.

It can also be noted that is the square of correlation between observed and predicted dependent variable.

and it lies between 0 and 1.


Related Solutions

QUESTION: a) State any two weaknesses of R2 as a measure of goodness of fit of...
QUESTION: a) State any two weaknesses of R2 as a measure of goodness of fit of a regression model b) In the context of a linear regression model , give two examples of hypotheses that cannot be tested using either an F-Test or a t-Test c)State any three methods that can be used to estimate the parameters of a linear regression model d)In what ways does a population regression function differ from a sample regression function? e)Explain three important implications...
Explain the differences between the regression model, the regression equation, and the estimated-regression equation. Discuss the...
Explain the differences between the regression model, the regression equation, and the estimated-regression equation. Discuss the application of regression analysis in business decision making. Give examples on how the regression analysis can be used in business.
Determine the Best Fit Linear Regression Equation Using Technology - Excel Question The table shows the...
Determine the Best Fit Linear Regression Equation Using Technology - Excel Question The table shows the age in years and the number of hours slept per day by 24 infants who were less than 1 year old. Use Excel to find the best fit linear regression equation, where age is the explanatory variable. Round the slope and intercept to one decimal place. Age Hours 0.03 16.5 0.05 15.2 0.06 16.2 0.08 15.0 0.11 16.0 0.19 16.0 0.21 15.0 0.26 14.5...
Question 1 The Goodness of Fit test and the Test of Independence are two forms of...
Question 1 The Goodness of Fit test and the Test of Independence are two forms of which of the following test? (2 points) Regression analysis Correlation analysis Chi-square analysis Independent samples t-test Related samples t-test We can make cause-and-effect statements when: (2 points) We run correlations to see how two variables are related to one another We use experimental manipulations (i.e., through the manipulation of the independent variable) What type of question do chi-squares answer? (2 points) Can we predict...
The estimated regression equation for these data is ŷ = 70 − 3x.
Consider the data. xi 3 12 6 20 14 yi 55 35 60 10 25 The estimated regression equation for these data is ŷ = 70 − 3x. (a) Compute SSE, SST, and SSR using equations SSE = Σ(yi − ŷi)2, SST = Σ(yi − y)2, and SSR = Σ(ŷi − y)2. SSE= SST= SSR= (b) Compute the coefficient of determination r2. (Round your answer to three decimal places.) r2 = (c) Compute the sample correlation coefficient. (Round your answer...
QUESTION 10 For a chi-square goodness-of-fit test, what is the number of degrees of freedom, if...
QUESTION 10 For a chi-square goodness-of-fit test, what is the number of degrees of freedom, if the number of categories in the distribution is 9? what is the critical value for a 1% level of significance?
In a regression analysis involving 30 observations, the following estimated regression equation was obtained. ŷ =...
In a regression analysis involving 30 observations, the following estimated regression equation was obtained. ŷ = 17.6 + 3.2x1 − 2.2x2 + 7.6x3 + 2.7x4 1. Interpret b1 in this estimated regression equation. (choose an option) a)b1 = −2.2 is an estimate of the change in y corresponding to a 1 unit change in x1 when x2, x3, and x4 are held constant. b)b1 = 7.6 is an estimate of the change in y corresponding to a 1 unit change...
Develop a scatter diagram for these data. Develop the estimated regression equation.
Given the following: X: 1    2    3 4    5 Y: 3    7    5    11    14 Develop a scatter diagram for these data. Develop the estimated regression equation. Use the estimated regression equation to predict the value of Y when X = 4
Find the linear regression equation (line of best fit), determine the correlation, and then make a...
Find the linear regression equation (line of best fit), determine the correlation, and then make a prediction. 1. The table below gives the amount of time students in a class studied for a test and their test scores. Graph the data on a scatter plot, find the line of best fit, and write the equation for the line you draw. Hours Studied 1 0 3 1.5 2.75 1 0.5 2 Test Score 78 75 90 89 97 85 81 80...
Estimate a simple linear regression model and present the estimated linear equation. Display the regression summary...
Estimate a simple linear regression model and present the estimated linear equation. Display the regression summary table and interpret the intercept and slope coefficient estimates of the linear model.                                                           Estimate a simple linear regression model and present the estimated linear equation. Display the regression summary table and interpret the intercept and slope coefficient estimates of the linear model.                                                           
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT