Andrew Eskander
Math 11L
April 18, 2008
Lab 3
1.
The equation of the regression line is
BMR = 157 + 0.187 * Mass
.
50000
40000
30000
20000
10000
0
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
Mass
BMR
Scatterplot of BMR vs Mass
2.
The regression line predicts the BMR of the Eastern Chipmunk to be
173.24
(BMR =
157 + .187(87.4) = 173.34) and the BMR of the Aardvark to be
9139.44
(BMR = 157
+ .187(6144) = 9133).
These predictions are much more than the observed values (90
and 6144 respectively) of the Eastern Chipmunk and Aardvark.
3.
Judging from both plots, I think that my linear regression model is not appropriate for
predicting basal metabolic rate from body size because there are several outliers that
distort the predictions of the BMR.
There are too many points far from the line in the
residual and scatterplots that offset the points clustered in proximity to the line in
each plot, thus, making my model unevenly spread about the line and overall
inappropriate for predictions.
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 Spring '08
 staff
 Math, Statistics, Econometrics, Linear Regression, Regression Analysis, Errors and residuals in statistics, BMR, ma ss

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