(ii) An important factor in selecting software for
word-processing and database management systems is the time
required to learn how to use the system. To evaluate three file
management systems, a firm designed a test involving five
word-processing operators. Since operator variability was believed
to be a significant factor, each of the five operators was trained
on each of the three file management systems. The data obtained
follow. SYSTEM A B C 1 16 16 24 2 19 17 22 OPERATOR 3 14 13 19 4 13
12 18 5 18 17 22 (a) Compute all that apply: SST————-,
SSTR————–, SSBL————-, SSE————-,
MSTR————–, MSBL————-, MSE—————. (b)
Using  = .05, test to see whether there is any difference in the
mean training time (in hours) for the three systems (give full
ANOVA table values).