Concept explainers
a.
Explain why it is more sensible to let
a.
Explanation of Solution
In this case, it is observed that there is variability in the values of y at fixed values of x. Therefore, one cannot specify the individual values of y using x values, but can specify the mean of the individual values and the way mean changes when x changes.
Therefore, it is more sensible to let
b.
Explain why the model allows variation around the mean with its parameter
b.
Explanation of Solution
In this case, it is observed that the values of y differs at a fixed value of x and the parameter of the model
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