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Hunting
Long Range Hunting & Shooting
Test-Effect of Brushing Necks vs Graphite vs Both on ES
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<blockquote data-quote="Greasegun" data-source="post: 1841516" data-attributes="member: 112196"><p>I used to think this way about SD and ES. After studying statistics related to shooting, I realise now SD is actually more meaningful than ES. </p><p></p><p>For example. First of all, rifles are like random number generators, If you fire enough shots and graph them, the population will have a bell shape, where the majority of the shots fall into the mean area of the graph. This may take 100 shots or more to see the whole picture and what your true ES and SD are. Now for example if you fire 10 shots, your graph may look nothing like a bell. You could have 10 that all repeat close together, 10 widely scattered, or 9 almost the same and one strange outlier. They are all part of the same population. SD gives you a better idea of what the actual size of that population is, because its a measurement of 10 data points. ES only takes the best and worst of the 10. You have no idea really if those hi and low are at all indicative of the population. Statistics tell us a sample size of 10 is pretty insignificant. You need over 30 rounds to have 85-90% confidence that your group is real and not skewed by outliers. None of us have time to shoot 35 round groups, so we shoot 5 or 10 round groups, eliminate the bad and retest the good for confirmation. </p><p></p><p>To each his own, just trying to help!</p></blockquote><p></p>
[QUOTE="Greasegun, post: 1841516, member: 112196"] I used to think this way about SD and ES. After studying statistics related to shooting, I realise now SD is actually more meaningful than ES. For example. First of all, rifles are like random number generators, If you fire enough shots and graph them, the population will have a bell shape, where the majority of the shots fall into the mean area of the graph. This may take 100 shots or more to see the whole picture and what your true ES and SD are. Now for example if you fire 10 shots, your graph may look nothing like a bell. You could have 10 that all repeat close together, 10 widely scattered, or 9 almost the same and one strange outlier. They are all part of the same population. SD gives you a better idea of what the actual size of that population is, because its a measurement of 10 data points. ES only takes the best and worst of the 10. You have no idea really if those hi and low are at all indicative of the population. Statistics tell us a sample size of 10 is pretty insignificant. You need over 30 rounds to have 85-90% confidence that your group is real and not skewed by outliers. None of us have time to shoot 35 round groups, so we shoot 5 or 10 round groups, eliminate the bad and retest the good for confirmation. To each his own, just trying to help! [/QUOTE]
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Test-Effect of Brushing Necks vs Graphite vs Both on ES
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