I think the hypothesis is only supposed to state predictions about each treatment individually. So I guess I'm only comparing each hypothesis with the corresponding result of the experiment.

As far as a baseline, we only know the normal ranges for specific gravity and chloride ions, but not volume. Even that causes more headaches because I tried to find the margin of error for the graphs but the fact that we are measuring averaged differences between each sample time puts it far beyond my scope of ability to figure out.

I have never been this confused about an assignment in my life. Definitely doing some research on my future professors from now on.