TABLE 14-5 A Microeconomist Wants to Determine How Corporate Sales Are Influenced

question 109

Multiple Choice

TABLE 14-5
A microeconomist wants to determine how corporate sales are influenced by capital and wage spending by companies. She proceeds to randomly select 26 large corporations and record information in millions of dollars. The Microsoft Excel output below shows results of this multiple regression.
-Referring to Table 14-5, when the microeconomist used a simple linear regression model with sales as the dependent variable and wages as the independent variable, she obtained an r² value of 0.601. What additional percentage of the total variation of sales has been explained by including capital spending in the multiple regression?

• A) 60.1%
• B) 31.1%
• C) 22.9%
• D) 8.8%

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Definitions:

Midrange

The statistical measure calculated as the mean of the highest and lowest values in a data set, providing a simple estimation of the data’s central tendency.

Arithmetic Mean

The average of a set of numerical values, calculated by adding them together and then dividing by the number of values.

Largest Values

The highest numbers or quantities in a data set, often used in statistical analysis to determine the upper extremities.

Outlier

A data point that significantly differs from other observations in a data set, often indicating variability in a measurement or a novel discovery.