625 Elephants 500 375 250 Нррos 125 7.5 15.0 22.5 30.0 Life Expectancy (yr) Gestation (days)

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Elephants and hippos We removed humans from the
scatterplot in Exercise 31 because our species was an
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.

625
Elephants
500
375
250
Нррos
125
7.5
15.0
22.5
30.0
Life Expectancy (yr)
Gestation (days)
Transcribed Image Text:625 Elephants 500 375 250 Нррos 125 7.5 15.0 22.5 30.0 Life Expectancy (yr) Gestation (days)
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