A biologist believes that the addition of a certain chemical compound to a lake will effectively reduce the number of zebra mussels in the lake. He designs an experiment to test this claim and gets the following data. c1=0.05 Compute the test statistic to test for a reduction in zebra mussels with the added compound. Control (no added compound) Treatment (added compound) m = 42 n; = 4 1 fl= 22.3 mussels f3= 16.4 mussels $1 = 8.9 mussels 52: 10.8 mussels