Among the following, select ALL the research questions that can be anwered by a

Question

Among the following, select ALL the research questions that can be anwered by a F test (overall F test of partial F test) We want to compare a multiple linear regression model with a second model which consists of the same response but different predictors. We want to know which of the two models is better in predicting the response. O O We measured, for 22 trees, their diameter (at breast height) and their height. We want to know if there is sufficient evidence to conclude that there is a linear association between the tree diameter and the tree height. We have data about heart attacks in rabbits. We want to know if a regression model containing at least one predictor is useful in predicting the size of the infarct. We want to compare a model with a smaller model, which consists of a subset of predictors of the larger model. We want to know whether the larger model is appreciably better than the smaller one.

Explanation / Answer

Here , 1. We want to compare a multiple linear regression model with second model which consists of the same response but different predictors. We want to know which of the two models is better in predicting the response.

2. We want to compare a model with a smaller model, which consists of a subset of predictors of the large model . We want know whether the larger model is appreciably better than the smaller one .

We use F test for above two research questions.

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