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Chapter 12: Q. 3 (page 787)

Oil and residuals Researchers examined data on the depth of small defects in the Trans-Alaska Oil Pipeline. The researchers compared the results of measurements on 100defects made in the field with measurements of the same defects made in the laboratory. The figure shows a residual plot for the least-squares regression line based on these data. Explain why the conditions for performing inference about the slope 尾1 of the population regression line are not met.

Short Answer

Expert verified

Equal variance requirement has not been met.

Step by step solution

01

Given information:

We have been given that:

A residual plot for the least-squares regression line based on the data.

02

Explanation:

Conditions for performing inference:

1.Linearity

2.Independence

3.Equal Variance

4.Normality

5.Random

According to the residual plot for the least-squares regression line equal variance condition has not been met.

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