625 Elephants 500 375 250 Нррos 125 7.5 15.0 22.5 30.0 Life Expectancy (yr) Gestation (days)
Elephants and hippos We removed humans from the
outlier in life expectancy. The resulting scatterplot shows
two points that now may be of concern. The point in the
upper right corner of this scatterplot is for elephants, and
the other point at the far right is for hippos.a) By removing one of these points, we could make
the association appear to be stronger. Which point?
Explain.
b) Would the slope of the line increase or decrease?
c) Should we just keep removing animals to increase the
strength of the model? Explain.
d) If we remove elephants from the scatterplot, the slope
of the regression line becomes 11.6 days per year. Do
you think elephants were an influential point? Explain.
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