When the results shown in Tables 1, 2, 3 and 4 were
subjected to statistical test to determine whether or not the
differences observed in the mean values of average
waiting time, average turnaround time, average CPU
utilization and average throughput obtained from the
various algorithms are significant, the results obtained (for
5x1 problem size) are shown in Tables 5, 6, 7 and 8
respectively.
Table 5 shows that the performance of SJF with
respect to the average waiting time is significantly
different (at 5%) from the performances of both FC and
PS algorithms for the 5x1 problem size. Also, the
performance of SJF with respect to the average
turnaround time is significantly different (at 5%) from the
performances of both FC and PS algorithms for the 5x1
problem size (Table 6). The summary of the test of means
of SJF, FC and PS carried out with respect to the average
waiting time and average turnaround time for all the
problem sizes considered is shown in Table 9. It is evident
that the performance of SJF with respect to both the
average waiting time and average turnaround time is
significantly different (at 5%) from the performances of