jennaliu67
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plz, help ASAP! I'll give brainliest or whoever answers it right and gives an explanation

A quadratic model is fitted to a set of data that has a quadratic trend. What can be concluded about the residual plot? (select more than one)

A. The residuals will have a pattern
B. The residuals will form a parabola
C. The residuals will not form a pattern
D. The residuals will be scattered about the x-axis
E. The residuals will be scattered about the y-axis

Answer :

Answer:

C and D

Step-by-step explanation:

The residual is computed as follows:

Residual =  Observed – Predicted

If the quadratic model represents satisfactorily the data, then some predicted values will be greater, other will be equal, and others will be less than the observed ones. So, the residual plot will not form a pattern and it will be scattered about the x-axis (y-axis represents residual values)

If the residuals shows a pattern (like a parabola), then the model is not satisfactory

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