Science Forums 2

[lawcat]

The experiment goes like this (and it seems to me that this is not a lab, but a theoretical class, otherwise you would understand what is behind this science):

You are increasing liquid levels in a tube, and the tube contains some electromechanical sensors which sends out output, which is measured by a voltage measuring instrument.

You are calibrating the voltage reader instrument. (You do not care about liquid levels, but for the sake of symmetry in outputs, you are increasing the liquid levels by constant 1.5.) Based on those constant increases in liquid levels, you are measuring the deviation in voltage outputs as the liquid level goes up.

The instrument shows largest deviation from min to max voltage outputs in 7th iteration (5.7 -4.35). Thus, n max = 1.35. The maximum voltage output of the voltage measuring instrument for the trials is 10.2V, and the minimum is 0V.

Thus,

(5.7 -4.35) / (10.2-0) -> 13.2%

This instrument has standard deviation, or uncertainty, of up to 13.2% of the range of voltage outputs 10.2V. Having only single decimal point, and 13.2% deviation, this instrument is neither accurate nor precise.