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Rifles, Reloading, Optics, Equipment
Equipment Discussions
Garmin Xero - update
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<blockquote data-quote="JFCurl" data-source="post: 2976181" data-attributes="member: 125680"><p>So if I have a case of Tac-22 (5,000 rounds). That would be the population? And if I were shooting all 5,000 rounds you would use STDEV.P. In this case, I selected two boxes to shoot so that was a sample of the 5,000 even though its a fairly large sample from a shooting stand point so the correct use would be STDEV. Another way of looking at it with much smaller numbers would be that if I reloaded 200 rounds and randomly selected 10 to test, you would use STDEV. If the following weekend I went to a competition and shot the remaining 190 rounds and added in the data from the 10 test rounds, the proper formula would be STDEV.P since it was the entire batch or population?</p></blockquote><p></p>
[QUOTE="JFCurl, post: 2976181, member: 125680"] So if I have a case of Tac-22 (5,000 rounds). That would be the population? And if I were shooting all 5,000 rounds you would use STDEV.P. In this case, I selected two boxes to shoot so that was a sample of the 5,000 even though its a fairly large sample from a shooting stand point so the correct use would be STDEV. Another way of looking at it with much smaller numbers would be that if I reloaded 200 rounds and randomly selected 10 to test, you would use STDEV. If the following weekend I went to a competition and shot the remaining 190 rounds and added in the data from the 10 test rounds, the proper formula would be STDEV.P since it was the entire batch or population? [/QUOTE]
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Garmin Xero - update
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