1. The problem statement, all variables and given/known data I'm doing a quality of measurements coursework at the moment where I have to find the efficiency of the different volumes of water. To do this, I needed to use this formula: After measuring the efficiency of different volumes of water, I'm asked to assess the measurement's precision, I assume this is asking me to assess my measurement of the initial and final temperature of the heated water, the quantified amount of voltage and current, and the time taken for the water to heat up. 2. Relevant equations How do I exactly begin to assess this, how can I improve the precision? And where can I possibly see any systematic errors, I already looked up what systematic error means, and it seems way too complicated for me to understand. 3. The attempt at a solution Before even reading the question, I already looked for any outliers using this formula: I have two set of results and I found out there aren't any outliers. I kind of feel like this means that my results are reliable and I don't know exactly how else I can improve it if I've already gotten it right the first time around. Did I even get it right?