Power Regression: for what is this used?

[Guest]

What exactly do we use power regression for?

Say a graph with no equation but with x and y coordinates and I use a power regression tool to tell me the equation. Is this accurate enough? Is this what we use power regression for?
:?:

 

[stapel]

What exactly do we use power regression for?

One uses a power regression any time the data appears to be a good fit for such a regression. For instance, a data set that appeared to model a linear equation would not be a good candidate for a power regression.

Say...I use a power regression tool to tell me the equation. Is this accurate enough?

The regression gives "an" equation. "The" equation might not exist (if the thing producing the data turns out to be random, or at least not consistent), or a power regression might be a good model, even "the best" model, only for a limited duration.

Whether or not a given regression "is accurate enough" will depend entirely upon the circumstances of the data set and the needs of the model.

Eliz.

 

[Guest]

thank you Liz

you are a star!