Unit 3 Assignment 2 (2)

Unit 3 Assignment 2: Linear Relationships
Number 1
A scatterplot of longevity and Gestation
50
Longevity
40
30
20
10
0
0
100
200
300
400
Gestation
500
600
700
The correlation coefficient is 0.663. A moderately strong positive linear relationship exists
between longevity and gestation. A unit increase in gestation period increases the longevity
period. Removing outlier decreases the correlation coefficient.
Question 2
A scatterplot of longevity and Gestation
30
Lonegvity
25
20
15
10
5
0
0
100
200
300
Gestation
The new correlation coefficient is 0.519.
400
500
The new correlation coefficient is less than the correlation coefficient in question 1. The outlier
was influential point far from the estimated regression model on the upper side. Therefore,
inclusion of the outlier point increases correlation coefficient value.
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