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?
Definitions:
Midpoint
Refers to the exact middle point in a range of values, often calculated as the average of two extreme values in a set.
Sum
The result of adding a set of numbers or quantities together.
Mean Value
A statistical measure that determines the central tendency of a dataset by summing all values and dividing by the count of values, reflecting the dataset's average.
Exam Mean
The average score derived from a set of examination results, indicating the overall performance of the examinees.
Q6: Referring to Table 14-1, for these data,
Q9: Referring to 14-16, the error appears to
Q23: Referring to Table 15-4, the null hypothesis
Q30: Referring to Table 12-4, the calculated value
Q43: Referring to Table 13-5, the prediction for
Q93: Referring to Table 12-5, the critical value
Q120: Referring to Table 13-4, the managers of
Q133: Referring to Table 12-12, how many children
Q169: Referring to Table 14-13, the fitted model
Q281: Referring to Table 14-17 and using both