9.6 Using the Model for Estimation and Prediction
If we are satisfied that a useful model has been found to describe the relationship between reaction time and percent of drug in the bloodstream, we are ready for step 5 in our regression modeling procedure: using the model for estimation and prediction.
The most common uses of a probabilistic model for making inferences can be divided into two categories. The first is the use of the model for estimating the mean value of y, E(y), for a specific value of x.
For our drug reaction example, we may want to estimate the mean response time for all people whose blood contains 4% of the drug.
The second use of the model entails predicting a new individual y value for a given x.
That is, we may want ...
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