Question

You're designing an experiment that looks at the effect of different types of newly

developed fish food on the growth rate of three species of fish: tiger fish, guppies,
and goldfish. The treatments are new food #1, new food #2, and old food. For a
randomized block design, blocked on species of fish, how many treatment groups
would you have? (Think of "old food" as one of the treatments.)

Answer 1

I need this answer too, did you figure it out?