Use the Following to Answer the Question(s) Below

question 19

Multiple Choice

Use the following to answer the question(s) below.
Weekly commodity prices for heating oil (in cents) were obtained and regressed against time. Below is the regression output and residual plots from fitting a linear model.
-Based on the output and plots, which of the following statements is not true?

• A) The t-test for the regression slope indicates that it is significantly different from zero. However, histogram shows that the distribution is skewed to the right.
• B) According to the regression output, the model explains 71.9% of the variability in heating oil prices. However, the residual plot shows a clear pattern and curvature.
• C) The normal probability plot shows some bend and indicates that we probably cannot proceed with regression inference.
• D) The residual plot suggests that the Independence assumption might be violated.
• E) The histogram and plots show that all assumptions and conditions for regression inference are met.

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Definitions:

Chest Wall

The structures surrounding and protecting the thoracic cavity, including the ribs, sternum, and spine, providing support for the chest.

Pressure Ulcers

Damage to skin and underlying tissue resulting from prolonged pressure on the skin, often affecting individuals with limited mobility.

Lesions

Any abnormal tissue found on or in an organism, usually damaged by disease or trauma.

Flaky

Describes something peeling off in layers or flakes, often used in reference to skin or pastry.