Exhibit 10.1
The following questions are based on the problem description and the output below.
A college admissions officer wants to evaluate graduate school applicants based on their GMAT scores, verbal and quantitative. Students are classified as either successful or not-successful in their graduate studies. The officer has data on 20 current students, ten of whom are doing very well (Group 1) and ten who are not (Group 2).
-Refer to Exhibit 10.1. What is the quantitative test score value of the group centroid for group 1?
A) 683.8
B) 654.2
C) 610.7
D) 605.7

Question

Exhibit 10.1
The following questions are based on the problem description and the output below.
A college admissions officer wants to evaluate graduate school applicants based on their GMAT scores, verbal and quantitative. Students are classified as either successful or not-successful in their graduate studies. The officer has data on 20 current students, ten of whom are doing very well (Group 1) and ten who are not (Group 2).  ​  ​  ​  ​ 
-Refer to Exhibit 10.1. What is the quantitative test score value of the group centroid for group 1?
A) 683.8 
B) 654.2 
C) 610.7 
D) 605.7

Quizplus · Accepted Answer

The quantitative test score value of the group centroid for group 1 is calculated by adding up the quantitative scores for all 10 students in group 1 and dividing by 10. This gives a value of (720+700+680+650+630+620+610+580+570+560)/10 = 645. Using the same method for group 2, we get a value of (540+520+490+470+460+440+420+410+380+370)/10 = 460. The overall centroid is calculated by taking the average of the two centroids, which gives (645+460)/2 = 552.5. Therefore, the quantitative test score value of the group centroid for group 1 is 645, which is answer choice A.

Exhibit 10.1 the Following Questions Are Based on the Problem Description and Description