Help with statistics for dispensing experiment

Hi All, I need some help on a statistics problem.

I did an experiment where I was using high-speed imaging to measure the ejection velocities of droplets of an aqueous solution from two identical solenoid dispensing systems (A and B) at dispensing frequencies of 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0 Hz. For each frequency I dispensed a total of 30 droplets from each dispenser. The data I collected is in the attached .txt file.

The purpose of the experiment was to (a) measure the performance of the dispensing devices, and (b) see if frequency of dispensing influences droplet formation. My dilemma is: what statistical test should I use! I was initially thinking a weighted Two-way ANOVA, because of the heteroscedasticity, but I now think that there has to be an easier way. Can anyone suggest another way of processing my data?



N.B. My area of expertise is not statistics