Two catalysts are being analyzed to determine how they affect
the mean yield of a chemical process. Specifically, catalyst 1 is
currently used. Because catalyst 2 is cheaper, it should be
adopted, if it does not change the process yield. A test is run in
the pilot plant and results in the data shown in the Table below.
Both populations are assumed normal.
a) Assuming equal variances, using a hypothesis test at 5% alpha
level, show if there is any...