Uncertainty of a Ruler
So our uncertainty is - 05mm. Step 1Calculate the mean of all the measurements. Diagram Of How To Read A Metric Ruler Reading A Ruler Cookware Set Ruler 54 67 38 51 63 5 546. . Since the smallest distance we can measure with a ruler is 1 mm our uncertainty is - 1 mm and we can write our measurement as 203 mm - 1 mm. To calculate uncertainty you will use the formula. Measurements made with a ruler therefor have an uncertainty of between 132 inch and 164 inch and you shouldnt report any more digits than that. With the higher resolution of this ruler we can now say that our object is closest to the 53 cm mark. Best estimate uncertainty where the uncertainty is the possibility for error or the standard deviation. We can say that the measuring instrument is readable to 005 cm. The number of measurements is N5 so the mean is. EXAMPLE EXERCISE 21Uncertainty in Measurement Ruler A has an uncertainty of 01 cm and R