Difference between revisions of "Accurate"

Revision as of 19:11, 8 April 2019

Results are accurate if they are close to the true value.

Accuracy is achieved by:

If there are random errors and a small sample size taking repeat readings, removing anomalies and calculating an average can improve the accuracy.

If there are systematic errors or zero errors the results can be improved by finding the source of the error and correcting it.

Experimental Measurements of pi
Method	Test 1	Test 2	Test 3	Average	Range
Method 1	3.27	3.09	3.01	3.12	0.26
Method 2	3.91	3.88	3.88	3.89	0.03
Method 3	3.57	2.89	2.93	3.13	0.68
The number pi is 3.14159265359 correct to 12 significant figures. Method 1: The most accurate measurements because they are the closest to pi but they are not very precise because they have a range of 0.26. Method 2: These are the least accurate measurements because they are the furthest from pi but they are very precise because they have a range of only 0.03. Method 3: Each measurement is not accurate because they are far from pi, they are also the least precise because they have a range of 0.68. However, the average is the most accurate as it is the closes to pi.

@@ Line 8: / Line 8: @@
 :*Removing [[Zero Error|zero errors]] by [[Calibration|calibrating]] [[Measuring Instrument|instruments]] before the [[investigation]].
 :*[[Control Variable|Controlling]] all the [[variable]]s except for the [[Independent Variable|independent variable]] and the [[Dependent Variable]].
-: If there are [[Random Error|random errors]] and a small [[Sample Size|sample size]] taking [[repeat]] [[readings]], removing [[anomaly|anomalies]] and calculating an [[Mean Average|average]] can improve the '''accuracy'''.
+: If there are [[Random Error|random errors]] and a small [[Sample Size|sample size]] taking [[repeat]] [[reading]]s, removing [[anomaly|anomalies]] and calculating an [[Mean Average|average]] can improve the '''accuracy'''.
 : If there are [[Systematic Error|systematic error]]s or [[Zero Error|zero errors]] the [[results]] can be improved by finding the source of the [[error]] and correcting it.