Question

Cigarettes Is the nicotine content of a cigarette related
to the “tars”? A collection of data (in milligrams) on
29 cigarettes produced the scatterplot, residuals plot,
and regression analysis shown:

Dependent variable is: nicotine
R squared = 92.4,
Variable Coefficient
Constant 0.154030
Tar 0.065052
a) Do you think a linear model is appropriate here?
Explain.
b) Explain the meaning of R2
in this context.
1.2-
0.9+
0.6
0.3-
8
12
Tar (mg)
16
0.075
0.000
-0.075
-0.150
0.3
0.6
0.9
Predicted
1.2
Residuals
(6u) eupooIN
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Transcribed Image Text

1.2- 0.9+ 0.6 0.3- 8 12 Tar (mg) 16 0.075 0.000 -0.075 -0.150 0.3 0.6 0.9 Predicted 1.2 Residuals (6u) eupooIN