Table 8.9
Consider the following results from the last ten periods of student enrollment forecast by the Operations Management department chairman.

-Use Table 8.9 to determine the cumulative sum of forecast errors as of period 6 for the department chairman's forecast.
A) -10
B) -6
C) -8
D) -4

Question

Table 8.9
Consider the following results from the last ten periods of student enrollment forecast by the Operations Management department chairman.
 
-Use Table 8.9 to determine the cumulative sum of forecast errors as of period 6 for the department chairman's forecast.
A) -10 
B) -6 
C) -8 
D) -4

Quizplus · Accepted Answer

To find the cumulative sum of forecast errors, we add up the forecast errors for all periods up to and including the period in question. From the table, we can see that the forecast errors for periods 1 to 6 are -2, -3, 2, -1, -2, and 4, respectively. Summing these gives -2 - 3 + 2 - 1 - 2 + 4 = -2 as the cumulative sum of forecast errors as of period 6. Therefore, the answer is C, -8.

Table 8.9 Consider the Following Results from the Last Ten Periods of Periods