What would a hypothesis be and a mathematical expression of it for an experiment done to test:

What would a hypothesis be and a mathematical expression of it for an experiment done to test:

1. three different fertilizer application rates on 50 plants that were grown in individual pots and randomized by location.

2. Rats run through a maze before and after eating to determine if they were slower after being fed.

3. Madagascar hissing cockroaches that were tested to see if the prefer turning left or right in a T-maze.