Concept explainers
Regression between cereal sodium and sugar The following figure shows the result of a
a. What criterion is used in finding the line?
b. Can you draw a line that will result in a smaller sum of the squared residuals?
c. Now let’s look at a histogram of the residuals. Explain what the two short bars on the far right of the histogram mean in the context of the problem. Which two brands of cereal do they represent? Can you find them on the
d. In general, how reliable would you say amount of sugar is as a predictor of the amount of sodium?
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