Use the Following to Answer the Question(s) Below

question 37

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.
-Which assumption appears to be violated?

• A) Linearity
• B) Normality
• C) Equal Variance
• D) Linearity and Normality
• E) Linearity, Normality and Equal Variance assumptions are violated.

---

Definitions:

Confounding Variable

An external variable that influences the outcome of an experimental study, potentially skewing the results.

Dietary Restrictions

Limitations placed on the consumption of certain foods or ingredients due to health, religious, ethical, or personal reasons.

Math Skill

The ability to perform mathematical functions, which includes arithmetic operations as well as more complex tasks involving logic and reasoning.

Correlation

A statistical measure that indicates the extent to which two or more variables fluctuate together.