Sixty pairs of measurements were taken at random to estimate the relation between variables $$\(X\)$$ and $$\(Y\)$$. A least-squares regres- sion line was fitted to the collected data. The resulting residual plot is as follows: Which of the following conclusions is appropriate?
A.
A line is an appropriate model to describe the relation between \(X\) and \(Y\).
B.
A line is not an appropriate model to describe the relation between \(X\) and \(Y\).
C.
The assumption of normality of errors has been violated.
D.
The assumption of constant sample standard deviations has been violated.
E.
The variables \(X\) and \(Y\) are not related at all.
Exam No：AP Statistics Problem Set 11 Year：2024 Question No：APStatistics2024AP0447
Answer:
B
Knowledge points:
2.6 Linear Regression Models
2.7 Residuals
2.9 Analyzing Departures from Linearity
Solution:
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