R 240 Part A - Individuel Plots Th evenin Equivalent Circuits A closer look at t
ID: 2268554 • Letter: R
Question
R 240 Part A - Individuel Plots Th evenin Equivalent Circuits A closer look at the Resistor Sampling Data Lab A4 Individual Value Plot of Group C-1K at 10% to! 1.050 What forms of Variation are present Accuracy 1.025 Repeatability Reproducibility Discrimination 0.975 Explain your Rationale (below) 0.950 Chss What forms of Variation are present? Individual Value Plot of Group D --1Kat 1% tol 1.010 Accuracy Repeatability Reproducibility Discrimination 1.005 a. 1.000 . Explain your Rationale (below) 0.995 0.990 ClassExplanation / Answer
If the measured value is very near to the actual or the true value then the device is said to be accurate . For example if we consider the Ammeter is connected in a closed circuit which measures the value of 2.1A and if the actual value is 2A then the device is said to be in accuracy .
If the measures value is constant irrespective of the actual or true value then then the device is said to be in precision. For example if we consider the ammeter is connected in a closed circuit and it shows the value of 2.2 A even if we measure 5-10 times though the actual value is not near to 2A then the ammeter is a precise device.
Repeatability and reproducibility are the two ways of measuring precision.
We know the Engineers perform the test twice and thrice just to verify their readings. At this condition they may get variation in their readings.
Repeatability measures the variation in readings taken by the single instrument under similar conditions.
Reproducibility is the degree of agreement between the results of the project conducted with different instruments with changing the conditions like weather etc.
Discrimination refers to detectable difference among two or more instruments.
As stated in the above definition and with reference to the given plots we can conclude that :
In the plot 1 , the measured value is going on increasing and never been constant hence it is not precise, as the value is increasing more it is never been accurate. As there is a detectable difference among the two measurements, discrimination is possible.
In the plot 2, the values are exactly matching and previous values hence it is precise, but not accurate.
Repeatability not exists in the plot 2 as there is a very less variation but reproducibility exists which refers to agreement between the measured values. As there is a detectable difference between the measured values, discrimination is possible.
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