When You Add State Fixed Effects to a Simple Regression

question 15

Multiple Choice

When you add state fixed effects to a simple regression model for U.S. states over a certain time period, and the regression R² increases significantly, then it is safe to assume that

• A)the included explanatory variables, other than the state fixed effects, are unimportant.
• B)state fixed effects account for a large amount of the variation in the data.
• C)the coefficients on the other included explanatory variables will not change.
• D)time fixed effects are unimportant.

Recognize units of measurement in the metric system related to mass, volume, and length.

Understand the process of drawing a graph to represent experimental data correctly, including the placement of variables.

Differentiate between independent and dependent variables in scientific experiments.

Comprehend how to analyze and organize scientific data, including the use of tables, graphs, or drawings.

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Definitions:

Dispersion

The extent to which a set of values is spread out or dispersed around a central value, such as the mean.

Statistical Control

The use of statistical methods to monitor and control a process to ensure that it operates at its full potential, producing consistent, conforming products with minimal waste.

Design Specifications

Detailed descriptions of the materials, dimensions, and quality standards necessary to build a product.

X-bar Charts

A statistical tool used in quality control to track the average of a process over time, helping to identify trends or changes in the process.