Answer:
Travis should evaluate the data in the control group and compare it with the data from the treatment groups.
Step-by-step explanation:
If the new fish food has been tested through a scientific experiment, it means that there is a control group and a treatment group. The control group is formed by fish that did not receive the new food, but continued to be fed by the old food. The treatment group is the group formed by fish that received the new food and did not receive the old food. In this case, the fish growth data in the two treatments must be analyzed, to find out if the new food causes differences in fish capable of justifying the extra cost that this food imposes on production.
This is what Travis must analyze.