scatterplot

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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5.60 • Determining the age of an animal can sometimes
be a difficult task. One method of estimating the age of
harp seals is based on the width of the pulp canal in the
seal's canine teeth. To investigate the relationship between
age and the width of the pulp canal, researchers measured
age and canal width in seals of known age. The following
data on x = age (in years) and y = canal length (in mil-
limeters) are a portion of a larger data set that appeared in
the paper "Validation of Age Estimation in the Harp Seal
Using Dentinal Annuli" (Canadian Journal of Fisheries
and Aquatic Science [1983]: 1430-1441):
* 0.25 0.25 0.50 0.50 0.50 0.75 0.75 1.00
400
y
700
675
525
500
350
300 300
1.00
1.00
1.00
1.00 1.25 1.25 1.50 1.50
250
230
150
100
200
100
100
125
* 2.00
60
2.00 2.50 2.75 3.00 4.00 4.00 5.00
y
140
60
50
10
10
10
10
* 5.00 5.00 5.00 6.00 6.00
15
y
10
10
15
10
Construct a scatterplot for this data set. Would you de-
scribe the relationship between age and canal length as lin-
ear? If not, suggest a transformation that might straighten
the plot.
Transcribed Image Text:5.60 • Determining the age of an animal can sometimes be a difficult task. One method of estimating the age of harp seals is based on the width of the pulp canal in the seal's canine teeth. To investigate the relationship between age and the width of the pulp canal, researchers measured age and canal width in seals of known age. The following data on x = age (in years) and y = canal length (in mil- limeters) are a portion of a larger data set that appeared in the paper "Validation of Age Estimation in the Harp Seal Using Dentinal Annuli" (Canadian Journal of Fisheries and Aquatic Science [1983]: 1430-1441): * 0.25 0.25 0.50 0.50 0.50 0.75 0.75 1.00 400 y 700 675 525 500 350 300 300 1.00 1.00 1.00 1.00 1.25 1.25 1.50 1.50 250 230 150 100 200 100 100 125 * 2.00 60 2.00 2.50 2.75 3.00 4.00 4.00 5.00 y 140 60 50 10 10 10 10 * 5.00 5.00 5.00 6.00 6.00 15 y 10 10 15 10 Construct a scatterplot for this data set. Would you de- scribe the relationship between age and canal length as lin- ear? If not, suggest a transformation that might straighten the plot.
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