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vovangra [49]
3 years ago
10

In your own words, how do you create a residual plot that shows whether a linear model is an appropriate fit for the data?

Mathematics
2 answers:
tresset_1 [31]3 years ago
8 0

Step-by-step explanation:

We need to understand what residual plot is?

A residual plot is a graph that shows the residuals on the vertical axis and the independent variable on the horizontal axis.

Hence, there are 2 cases related to the relation between residual plot and a linear model:

1. If the points in a residual plot are randomly dispersed around the horizontal axis => the linear model is an appropriate fit for the data

2. If the points in a residual plot has a pattern => nonlinear model is more appropriate or the line have a bad fit with the set of the data.

Hope it will find you well.  

marissa [1.9K]3 years ago
4 0

Answer:

For this case we assume that we have n pairs of observations (x_1 ,y_1) ,...,(x_n, y_n). Ad we have a model in order to estimate the real values y_i with a model. And the residuals are given by:

e_i =y_i-\hat y_i

Then we find the residuals for the n observations.

After that we can create a plot of (e_i , x_i) , i =1,2,...,n.

Andd after create this graph if we see no pattern in the graph we can conclude that the linear pattern

Step-by-step explanation:

For this case we assume that we have n pairs of observations (x_1 ,y_1) ,...,(x_n, y_n). Ad we have a model in order to estimate the real values y_i with a model. And the residuals are given by:

e_i =y_i-\hat y_i

Then we find the residuals for the n observations.

After that we can create a plot of (e_i , x_i) , i =1,2,...,n.

Andd after create this graph if we see no pattern in the graph we can conclude that the linear pattern

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