DIURESIS LAB: WAS COFFEE A DIURETIC?

The caffeine in coffee is a diuretic (at high enough concentrations). Was the coffee we used in the BMS2031 lab strong enough to induce a diuretic effect?  

In order to answer this question, EXPLAIN, using the statistical analysis and graphing of the class data, whether coffee had a significant effect (or not) on the water diuresis (compare drinking coffee with drinking water).  

You must refer to the statistical analysis (including the relevant P value, if this is significant and the direction of change). 

[maximum 100 words]