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Thread: Help with statistics for dispensing experiment

  1. #1 Help with statistics for dispensing experiment 
    New Member
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    Jun 2018
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    Hi All,

    I need some help on a statistic 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 at 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 purpose was to (a) determine the variation of performance with drop frequency and (b) determine if both dispensing systems were performing the same. With the null hypotheses being (a) the rate at which droplets are dispensed is not influenced by frequency (which I believe should be the case) and (b) there is no significant difference between the dispensing systems. The dispensing systems were going to be used to arrays of droplets on a substrate.

    Initially I was going to perform a Two-Way ANOVA with replications, but I'm now having second thoughts. Can anyone tell me if this is the right decision? Or is there a better option?

    Thanks

    Robert


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