The following is a scatterplot between the number of calories and the alcohol co

Question

The following is a scatterplot between the number of calories and the alcohol contents for beers brewed in the United States. There are two regression lines, one including and one excluding the O'Doul's brand of beer.

Which of the following is correct? a) The regression line that is steeper includes the labeled point. b) The labeled point is an influential point. c) The labeled point is a lurking variable. d) This is an example based on averages because each bottle of beer does not have exactly the same alcohol content or calories. 220 200 180 160 6 140 120 100 80 60- O'Doul's Percent Alcohol

Explanation / Answer

The point O'Doul's is far away fom regrssion line so it seems to be an outlier. It is an influential point. That is removing it change the regression line. So option (b) is correct.

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