Question

A production plant has two complex fabricating systems, both of which are maintained at 2-week intervals. However, one system is twice as old as the other. The number of finished products fabricated daily by each of the systems is recorded for 30 working days, with the results given in the table. Do these data present sufficient evidence to conclude that the variability in daily production warrants increased maintenance of the older fabricating system? Use the p-value approach. (Use α = 0.05.)

Old System	New System
x1 = 239	x2 = 246
s1 = 28.1	s2 = 15.7

State the test statistic

F=

Answer 1

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