Which of the following are ways of validating a regression model? a.Collect new

Question

Which of the following are ways of validating a regression model?

a.Collect new data and compare the results

b. Validate the model by using the data that was used to develop it

c. Compare the results of the regression model to previous results

d. If the data set is large, split the data into two parts and cross-validate the results

a.Collect new data and compare the results

b. Validate the model by using the data that was used to develop it

c. Compare the results of the regression model to previous results

d. If the data set is large, split the data into two parts and cross-validate the results

Explanation / Answer

A regression model can be validated by validating the model by using the data that was used to develop it. By doing so the model can be made more reliable. also, while validating the regression model, it is suggested to split the data in to two parts (using 80-20 rule) and cross check both data sets by firstly, validating bigger set and then the smaller set. Comapring data sets will make sure that there are no biasness the data collected.

Hence, the correct optons are b. and d.

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