Researchers in Hawaii have recently documented a large increase in the prevalence of a bird parasite known as chewing lice.T Current data suggest that the prevalence of chewing lice may be less for bird species with a high degree of bill overnang. A species is said to have bill overn when the upper bill extends downward in front of the end of the lower bill. The following scatterplot shows the relationship between the prevalence of chewing lice and bill overhang for 8 bird species in the Hawaian islands. A residual plot is also shown. Scatterplot Residual Plot 0.9 03F 0.2 0.8 0.1E 2 0.7- 0.0 0.6 - -0.1 os -0.2- 0.4- 03E 0.3- 0.2 -0.4 0.0 02 0.0 0.4 06 0.8 10 04 0.6 0.8 10 Bill Overhang Bill Overhang Use these plots to identify any outliers or potentially influential observations. For each point you identify, assess its influence on the estimated slope of the regression line. The point at (0.34, 0.33) is an --Select- The point at (0.39, 0.89) is an -Select- The point at (0.80, 0.48) is an -Select- The point at (1.00, 0.31) is an -Select-- v. Without this point, the slope of the regression line would be -Select- . Without this point, the slope of the regression line would be -Select- v. Without this point, the slope of the regression line would be -Select-- v. Without this point, the slope of the regression line would be -Select-

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
Problem 15PPS
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Researchers in Hawaii have recently documented a large increase in the prevalence of a bird parasite known as chewing lice.t Current data suggest that the prevalence of chewing lice may be less for bird species with a high degree of bill overhang. A species is said to have bill overhang
when the upper bill extends downward in front of the end of the lower bill. The following scatterplot shows the relationship between the prevalence of chewing lice and bill overhang for 8 bird species in the Hawaiian Islands. A residual plot is also shown.
Scatterplot
Residual Plot
0.9H
0.3
0.2
0.8
0.1
0.7
0.0
0.6
-0.1
0.5
-0.2
0.4
-0.3
0.3
-0.4
0.0
0.2
0.4
0.6
0.8
1.0
0.0
0.2
0.4
0.6
0.8
1.0
Bill Overhang
Bill Overhang
Use these plots to identify any outliers or potentially influential observations. For each point you identify, assess its influence on the estimated slope of the regression line.
The point at (o.34, 0.33) is an --Select---
The point at (o.39, 0.89) is an -Select---
The point at (0.80, 0.48) is an -Select---
The point at (1.00, 0.31) is an --Select---
Without this point, the slope of the regression line would be --Select---
v. Without this point, the slope of the regression line would be
v. Without this point, the slope of the regression line would be ---Select--
Without this point, the slope of the regression line would be --Select--
Select---
Lice Prevalence
Residual
Transcribed Image Text:Researchers in Hawaii have recently documented a large increase in the prevalence of a bird parasite known as chewing lice.t Current data suggest that the prevalence of chewing lice may be less for bird species with a high degree of bill overhang. A species is said to have bill overhang when the upper bill extends downward in front of the end of the lower bill. The following scatterplot shows the relationship between the prevalence of chewing lice and bill overhang for 8 bird species in the Hawaiian Islands. A residual plot is also shown. Scatterplot Residual Plot 0.9H 0.3 0.2 0.8 0.1 0.7 0.0 0.6 -0.1 0.5 -0.2 0.4 -0.3 0.3 -0.4 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.2 0.4 0.6 0.8 1.0 Bill Overhang Bill Overhang Use these plots to identify any outliers or potentially influential observations. For each point you identify, assess its influence on the estimated slope of the regression line. The point at (o.34, 0.33) is an --Select--- The point at (o.39, 0.89) is an -Select--- The point at (0.80, 0.48) is an -Select--- The point at (1.00, 0.31) is an --Select--- Without this point, the slope of the regression line would be --Select--- v. Without this point, the slope of the regression line would be v. Without this point, the slope of the regression line would be ---Select-- Without this point, the slope of the regression line would be --Select-- Select--- Lice Prevalence Residual
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