There are two different choices of a catalyst to stimulate a certain chemical process. To test whether the variance of the yield is the same no matter which catalyst is used, a sample of 10 batches is produced using the first catalyst, and 12 using the second.

If the resulting data is S2 1

= .14 and S2 2

= .28, can we reject, at the 5 percent level, the hypothesis of equal variance?