Random Error https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236 2026-05-01T00:25:34Z 2026-05-01T00:25:34Z Emma Woolliams https://calvalportal.ceos.org/web/guest/cal/val-wiki/-/wiki/668236/Random Error?_com_liferay_wiki_web_portlet_WikiPortlet_version=1.1 2021-10-09T22:19:50Z 2020-01-23T10:42:21Z

<p> <strong>Definition</strong></p><p> <span style="font-size: 8pt;">(1) component of measurement error that in replicate measurements varies in an unpredictable manner </span></p><div> NOTE 1 A reference quantity value for a random measurement error is the average that would ensue from an infinite number of replicate measurements of the same measurand. </div><div> NOTE 2 Random measurement errors of a set of replicate measurements form a distribution that can be summarized by its expectation, which is generally assumed to be zero, and its variance.</div><div> NOTE 3 Random measurement error equals measurement error minus systematic measurement error. </div><div>  </div><div> (2) component of forecast error that varies in an unpredictable manner</div><div>  </div><p> <strong>Source</strong></p><p> <span style="font-size: 8pt;">(1) VIM/ISO:99 [<a href="https://www.bipm.org/en/publications/guides/vim.html">RD18</a>]</span></p><div> (2) MACC [RD13]</div><div>  </div><div> RD13: MACC II Service Validation Protocol, Deliverable D153.1, May 2013</div><div>  </div><p> <strong>Suggestions</strong></p><p><span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff"> </span><span class="diff-html-added" id="added-diff-0" previous="first-diff" changeId="added-diff-0" next="last-diff"> </span></p><p><span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff"> </span><strong style="font-size: 8pt;"><span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff">Category</span></strong><span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff"><!----></span></p><p><span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff"> </span><a href="https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fcalvalportal.ceos.org%2Ft-d_wiki%3Fp_p_id%3D54_INSTANCE_Wg3ti1194i20%26p_p_lifecycle%3D0%26p_p_state%3Dnormal%26p_p_mode%3Dview%26p_p_col_id%3Dcolumn-2%26p_p_col_count%3D1%26_54_INSTANCE_Wg3ti1194i20_struts_action%3D%252Fwiki_display%252Fview%26_54_INSTANCE_Wg3ti1194i20_nodeName%3DCEOS_Terms_and_Definitions%26_54_INSTANCE_Wg3ti1194i20_title%3D2.%2BMeasurement%2Band%2BMetrology%2Bwords&amp;data=04%7C01%7Cfaye.lai%40npl.co.uk%7C71d207afa14d469389d808d988e92c16%7C601e5460b1bf49c0bd2de76ffc186a8d%7C1%7C0%7C637691357310852893%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=6Z7RKKAjDIIw%2Bbkm%2ByC1Y59lUo%2FBNQDiM6JtmtGQLes%3D&amp;reserved=0"><span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff">2. Measurement and Metrology words</span></a><span class="diff-html-added" previous="first-diff" changeId="added-diff-0" next="last-diff"><!----></span></p>

Emma Woolliams 2020-01-23T10:42:21Z