TABLE 10-17
A realtor wants to compare the mean sales-to-appraisal ratios of residential properties sold in four neighborhoods (A, B, C, and D). Four properties are randomly selected from each neighborhood and the ratios recorded for each, as shown below.
A: 1.2, 1.1, 0.9, 0.4 C: 1.0, 1.5, 1.1, 1.3
B: 2.5, 2.1, 1.9, 1.6 D: 0.8, 1.3, 1.1, 0.7
Interpret the results of the analysis summarized in the following table:

-Referring to Table 10-17, the among group degrees of freedom is
A) 3.
B) 4.
C) 12.
D) 16.

Question

TABLE 10-17
A realtor wants to compare the mean sales-to-appraisal ratios of residential properties sold in four neighborhoods (A, B, C, and D). Four properties are randomly selected from each neighborhood and the ratios recorded for each, as shown below.
A: 1.2, 1.1, 0.9, 0.4 C: 1.0, 1.5, 1.1, 1.3
B: 2.5, 2.1, 1.9, 1.6 D: 0.8, 1.3, 1.1, 0.7
Interpret the results of the analysis summarized in the following table:
 
-Referring to Table 10-17, the among group degrees of freedom is
A) 3. 
B) 4. 
C) 12. 
D) 16.

Quizplus · Accepted Answer

The among group degrees of freedom is calculated as the number of groups minus one. If the choices are 3, 4, 12, and 16, the correct answer is 3, indicating there are 4 groups (4-1=3).

TABLE 10-17 a Realtor Wants to Compare the Mean Sales-To-Appraisal Ratios of Ratios