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	<title>5 why and how technique - Revision history</title>
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	<updated>2026-10-25T09:26:58Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://wiki.dirkjanswagerman.nl/index.php?title=5_why_and_how_technique&amp;diff=2595&amp;oldid=prev</id>
		<title>Dirkjan: Created page with &quot;Asking: * Who? ** A Census is defined as the complete enumeration of all people, items or organization that is relevant for a data investigation question. A sample...&quot;</title>
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		<updated>2020-08-25T08:14:52Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;Asking: * Who? ** A &lt;a href=&quot;/index.php?title=Census&amp;amp;action=edit&amp;amp;redlink=1&quot; class=&quot;new&quot; title=&quot;Census (page does not exist)&quot;&gt;Census&lt;/a&gt; is defined as the complete enumeration of all people, items or organization that is relevant for a data investigation question. A sample...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;Asking:&lt;br /&gt;
* Who?&lt;br /&gt;
** A [[Census|Census]] is defined as the complete enumeration of all people, items or organization that is relevant for a data investigation question. A sample is just a part of that.&lt;br /&gt;
** So the first question in any problem is to identify a relevant [[Population|Population]] based on which correct inferences can be made.&lt;br /&gt;
** Decide for census or sample&lt;br /&gt;
** Surveys are preferred when cost or time constraints exists&lt;br /&gt;
** Samples should be representative and sufficiently large&lt;br /&gt;
* What?&lt;br /&gt;
** What data will depend on what we want to achieve.&lt;br /&gt;
** A statement of objectives will be helpful.&lt;br /&gt;
** Discriminate between primary data (data to be acquired for a new purpose) and secondary data (data that is already available but has been collected for another purpose)&lt;br /&gt;
* Where?&lt;br /&gt;
** Distinguish between internally and externally gathered data&lt;br /&gt;
** In externally collected data verify the validity.&lt;br /&gt;
* Why?&lt;br /&gt;
** [[http://www.imsworld.org/images/docs/Doc%206i%20issue%201%20guidance%20notes%20on%205%20Whys%20Technique.pdf|Keep asking]]&lt;br /&gt;
* How?&lt;br /&gt;
** Which techniques and analysis will you use?&lt;br /&gt;
&lt;br /&gt;
Part of [[M7-Quantitative Decision Methods-S1 - Managing Data and Survey Methods|M7-Quantitative Decision Methods-S1 - Managing Data and Survey Methods]]&lt;br /&gt;
[[Category:mbi]]&lt;br /&gt;
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[[Category:Decision]]&lt;br /&gt;
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[[Category:M7]]&lt;br /&gt;
&lt;br /&gt;
[[Category:Methods]]&lt;br /&gt;
&lt;br /&gt;
[[Category:Model]]&lt;br /&gt;
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[[Category:Quantitative]]&lt;br /&gt;
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[[Category:Term]]&lt;/div&gt;</summary>
		<author><name>Dirkjan</name></author>
		
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