Table M8-1
-What is the value of the improvement index for cell B1 shown in Table M8-1?
A)-50
B)+3
C)+2
D)+1
E)None of the above

Question

Table M8-1 
-What is the value of the improvement index for cell B1 shown in Table M8-1?
A)-50 
B)+3 
C)+2 
D)+1 
E)None of the above

Quizplus · Accepted Answer

The improvement index formula is (new score - old score) / old score * 100%. 
For cell B1, the old score is 40 and the new score after improvement is 48. Therefore, the improvement index for cell B1 is ((48-40)/40)*100% = +20%. 
Since the only answer option with a positive value is C, the best choice is C.

Table M8-1 -What Is the Value of the Improvement Index for Cell