a. The residuals will have a sample mean of 1 which will be the center of the cu

Question

a. The residuals will have a sample mean of 1 which will be the center of the curved pattern demonstrated by the data points. b. The graph should appear as a random scatter of points about zero on the residual's axis. c. d. There should be no apparent patterns in the graph. A plot of the residuals versus the predicted values can be used to check for a constant variance as well as to make sure that the linear model is adequate. Which of the following is not a property of a graph that indicates a constant variance and an adequate fit for a line ar model?

Explanation / Answer

Defination of Residuals: The difference between the observed value of the dependent variable (y) and the predicted value () is called the residual (e).

Each data point has one residual .

  Note that  the sum of residual is equal to zero and the mean of residual is also zero.

So in option a. The residuals will have a sample mean of 1 which will be the center of the curved pattern demonstrated by the data points

This is not the property of graph that indicates constant variance and an adequate fit for a linear model.

So option A ) is correct .

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