Changes

← Older edit

Accurate

9,183 bytes added, 10:08, 30 November 2019

no edit summary

:*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~~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.

===Accuracy vs Precision===

{| class="wikitable"

|+ Experimental Measurements of [[pi]]

|-

| style="height:20px; width:100px; text-align:center;" |'''Method'''

| style="height:20px; width:100px; text-align:center;" |'''Test 1'''

| style="height:20px; width:100px; text-align:center;" |'''Test 2'''

| style="height:20px; width:100px; text-align:center;" |'''Test 3'''

| style="height:20px; width:100px; text-align:center;" |'''Average'''

| style="height:20px; width:100px; text-align:center;" |'''Range'''

|-

| style="height:20px; width:100px; text-align:center;" |Method 1

| style="height:20px; width:100px; text-align:center;" |3.27

| style="height:20px; width:100px; text-align:center;" |3.09

| style="height:20px; width:100px; text-align:center;" |3.01

| style="height:20px; width:100px; text-align:center;" |3.12

| style="height:20px; width:100px; text-align:center;" |0.26

|-

| style="height:20px; width:100px; text-align:center;" |Method 2

| style="height:20px; width:100px; text-align:center;" |3.91

| style="height:20px; width:100px; text-align:center;" |3.88

| style="height:20px; width:100px; text-align:center;" |3.89

| style="height:20px; width:100px; text-align:center;" |0.03

|-

| style="height:20px; width:100px; text-align:center;" |Method 3

| style="height:20px; width:100px; text-align:center;" |3.57

| style="height:20px; width:100px; text-align:center;" |2.89

| style="height:20px; width:100px; text-align:center;" |2.93

| style="height:20px; width:100px; text-align:center;" |3.13

| style="height:20px; width:100px; text-align:center;" |0.68

|-

| style="height:20px; width:100px; text-align:left;" colspan = "6"|

: The number [[pi]] is 3.14159265359 correct to 12 [[Significant Figures|significant figures]].

Method 1: ~~3.1 is an~~ The most [[accurate]] ~~value for~~ [[measurement]]s because they are the closest to [[pi]] but ~~it is~~ they are not very [[precise]] ~~- Close to~~ because they have a [[range]] of 0.26. Method 2: These are the least [[accurate]] [[measurement]]s because they are the ~~real number,~~ furthest from [[pi]] but they are very [[precise]] because they have a [[range]] of only 0.03. Method 3: Each [[measurement]] is not ~~many~~ [[~~Significant Figures~~accurate]] because they are far from [[pi]], they are also the least [[precise]] because they have a range of 0.68. However, the [[Mean Average|~~significant figures~~average]]is the most [[accurate]] as it is the closes to [[pi]].|} {{#ev:youtube|https://www.youtube.com/watch?v=hRAFPdDppzs}} ===References=======AQA====:[https://www.amazon.co.uk/gp/product/1782945563/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945563&linkCode=as2&tag=nrjc-21&linkId=9a1d023a374038e6072f33c4f3cf808b ''Accuracy (of results), page 5, GCSE Biology; The Revision Guide, CGP, AQA'']:[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''Accuracy of results, page 274, GCSE Chemistry, Hodder, AQA'']: 3[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Accuracy, page 13, GCSE Physics, Hodder, AQA'']:[https://www.amazon.co.uk/gp/product/1471851338/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851338&linkCode=as2&tag=nrjc-21&linkId=425855d5890466e47189e1c21b67a1ea ''Accuracy, page 148, GCSE Biology, Hodder, AQA'']:[https://www.amazon.co.uk/gp/product/1782945598/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945598&linkCode=as2&tag=nrjc-21&linkId=ad276ad49df77ab4b40ab4fd0fe09654 ''Accuracy, page 5, GCSE Combined Science; The Revision Guide, CGP, AQA'']:[https://www.amazon.co.uk/gp/product/178294558X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294558X&linkCode=as2&tag=nrjc-21&linkId=f0dfb66dafcb0c6e9449e7b1a4ae1ac7 ''Accuracy, page 5, GCSE Physics; The Revision Guide, CGP, AQA'']:[https://www.amazon.co.uk/gp/product/1782945571/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945571&linkCode=as2&tag=nrjc-21&linkId=9e29fad914244909903e5e93f8a01d28 ''Accuracy, page 6, GCSE Chemistry; The Revision Guide, CGP, AQA'']:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Accuracy, pages 10, 204, GCSE Combined Science Trilogy 2, Hodder, AQA'']:[https://www.amazon.co.uk/gp/product/0008158762/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158762&linkCode=as2&tag=nrjc-21&linkId=a0fffa35b3ea49a63404f6704e0df7cc ''Accuracy, pages 104, 286, GCSE Chemistry; Student Book, Collins, AQA'']:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Accuracy, pages 266-267, GCSE Chemistry; Third Edition, Oxford University Press, AQA'']:[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Accuracy, pages 279-280, GCSE Physics; Third Edition, Oxford University Press, AQA'']:[https://www.amazon.co.uk/gp/product/1782946403/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946403&linkCode=as2&tag=nrjc-21&linkId=32a0abb60dff015b15b50e9b1d7b4644 ''Accurate results, page 11, GCSE Combined Science Trilogy; Physics, CGP, AQA'']:[https://www.amazon.co.~~2111 is a~~ uk/gp/product/1782945954/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945954&linkCode=as2&tag=nrjc-21&linkId=100574c08fbbb64318256eb79ed61a76 ''Accurate results, page 12, GCSE Biology, CGP, AQA'']:[https://www.amazon.co.uk/gp/product/1782945962/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945962&linkCode=as2&tag=nrjc-21&linkId=476bb5c8d1dfb5c08ac81b6d4d1c98d8 ''Accurate results, page 12, GCSE Chemistry, CGP, AQA'']:[~~precise~~https://www.amazon.co.uk/gp/product/1782946381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946381&linkCode=as2&tag=nrjc-21&linkId=5ec5fc3f6429e30c1d9ab9bca2bccf93 ''Accurate results, page 12, GCSE Combined Science Trilogy; Biology, CGP, AQA'']:[https://www.amazon.co.uk/gp/product/178294639X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294639X&linkCode=as2&tag=nrjc-21&linkId=51599bb45a2bfaf7c1b6a978b2ca2616 ''Accurate results, page 12, GCSE Combined Science Trilogy; Chemistry, CGP, AQA ''] ~~value~~ :[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Accurate results, page 12, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA''] ====Edexcel====:[https://www.amazon.co.uk/gp/product/1782948147/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948147&linkCode=as2&tag=nrjc-21&linkId=f63dcd8345f4e49c717b39a228a36c7c ''Accuracy, page 12, GCSE Chemistry, CGP, Edexcel '']:[pihttps://www.amazon.co.uk/gp/product/1782945741/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945741&linkCode=as2&tag=nrjc-21&linkId=30da4f2178da182547b62a7329d13b57 ''Accuracy, page 5, GCSE Combined Science; The Revision Guide, CGP, Edexcel '']:[https://www.amazon.co.uk/gp/product/1782946748/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946748&linkCode=as2&tag=nrjc-21&linkId=a4f0348fc37d0ba1bb52d27f8679581f ''Accuracy, page 6, GCSE Biology; The Revision Guide, CGP, Edexcel '']:[https://www.amazon.co.uk/gp/product/1782945725/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945725&linkCode=as2&tag=nrjc-21&linkId=694be7494de75af3349537d34e13f7f0 ''Accuracy, page 6, GCSE Chemistry; The Revision Guide, CGP, Edexcel ''] ~~but it is~~ :[https://www.amazon.co.uk/gp/product/1782945733/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945733&linkCode=as2&tag=nrjc-21&linkId=2a2dbec9db6bf5766c0458d908fa0a52 ''Accuracy, page 6, GCSE Physics; The Revision Guide, CGP, Edexcel ''~~inaccurate~~]:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Accuracy, pages 12, 15, GCSE Physics, CGP, Edexcel ' ']:[https://www.amazon.co.uk/gp/product/1782948120/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948120&linkCode=as2&tag=nrjc- ~~Not close enough to the real number~~21&linkId=dedef775c6a43dbb0a609441525adac0 ''Accurate results, page 12, GCSE Biology, CGP, ~~but has several~~ Edexcel ''] ====OCR==== :[https://www.amazon.co.uk/gp/product/1782945695/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945695&linkCode=as2&tag=nrjc-21&linkId=ceafcc80bcad6b6754ee97a0c7ceea53 ''Accuracy, page 5, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR '']:[~~Significant Figures|significant figures~~https://www.amazon.co.uk/gp/product/1782945660/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945660&linkCode=as2&tag=nrjc-21&linkId=83aa4500ad7759e7f401a1c5ba5df758 ''Accuracy, page 6, Gateway GCSE Biology; The Revision Guide, CGP, OCR '']:[https://www.amazon.co.uk/gp/product/1782945679/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945679&linkCode=as2&tag=nrjc-21&linkId=a2db42f7b4bdf10cafaafa3bb9120940 ''Accuracy, page 6, GCSE Chemistry; The Revision Guide, CGP, OCR Gateway '']:[https://www.amazon.co.uk/gp/product/0198359829/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359829&linkCode=as2&tag=nrjc-21&linkId=90e8d7b4f039d53035238fa0320fe00b ''Accuracy, pages 10, 11, 152, 166, Gateway GCSE Chemistry, Oxford, OCR '']

Ellen References

2,903

edits