The Editors of a National Automotive Magazine Recently Studied 30

question 93

Multiple Choice

The editors of a national automotive magazine recently studied 30 different automobiles sold in the United States with the intent of seeing whether they could develop a multiple regression model to explain the variation in highway miles per gallon. A number of different independent variables were collected. Included in these were two variables described as follows: If these two variables are to be included in a regression model, how many additional variables will be needed?

• A) The model explains nearly 63 percent of the variation in the dependent variable.
• B) If tested at the 0.05 significance level, the overall model would be considered statistically significant.
• C) The variable X1 has a slope coefficient that is significantly different from zero if tested at the 0.05 level of significance.
• D) All of the above are true.

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Definitions:

Unemployment

The situation of being out of work and actively seeking employment.

Depression

A common and serious medical illness that negatively affects how you feel, the way you think, and how you act, leading to feelings of sadness and/or a loss of interest in activities.

Tertiary Intervention

Strategies or measures taken to manage and mitigate the long-term effects or complications of a condition or disease.

Secondary Intervention

Actions or strategies that aim to reduce the impact of a problem or disease that has already manifested.