topic Re: Possible problem with standard error calculation for Nearest Neighbor Statistic? in Spatial Statistics Questions https://community.esri.com/t5/spatial-statistics-questions/possible-problem-with-standard-error-calculation/m-p/301355#M1006 <HTML><HEAD></HEAD><BODY><SPAN>This is great.&nbsp; Thank you so much William for helping me understand the differences between the two equations.&nbsp; I guess what had me really confused was that the first paper had the equation for standard error, whereas the second had the equation for the standard deviation.&nbsp; I am still a little shaky on the derivation of this equation, but I understand it enough to implement it properly.&nbsp; Thanks again.</SPAN></BODY></HTML> Tue, 21 Dec 2010 17:44:22 GMT WinnKetchum 2010-12-21T17:44:22Z Possible problem with standard error calculation for Nearest Neighbor Statistic? https://community.esri.com/t5/spatial-statistics-questions/possible-problem-with-standard-error-calculation/m-p/301354#M1005 <HTML><HEAD></HEAD><BODY><SPAN>So I noticed today that the equation used to calculate the standard error for the nearest neighbor statistic is 0.26136/((N**2/A)**0.5).&nbsp; This seems to be the same as the equation given by Clark and Evan (1954).&nbsp; However the equation Clark and Evan give in 1979 is 0.26136/((N/A)**0.5).&nbsp; This seems to be a problem, as the equation I use for the standard error for 3-dimensions also comes from the 1979 paper and is 0.20136/((N/V)**0.3333), where V is the volume.&nbsp; Does this mean that this last equation should really be 0.20136/((N**3/V)**0.3333) and that it is wrong in Clark and Evan's 1979 paper as well?&nbsp; If anyone has an answer to this or an explanation, I would greatly appreciate it.&nbsp; </SPAN><BR /><BR /><SPAN>I attached the 1979 paper in case you need it.</SPAN><BR /><BR /><SPAN>Thanks,</SPAN><BR /><SPAN>Winn</SPAN></BODY></HTML> Mon, 20 Dec 2010 18:25:24 GMT https://community.esri.com/t5/spatial-statistics-questions/possible-problem-with-standard-error-calculation/m-p/301354#M1005 WinnKetchum 2010-12-20T18:25:24Z Re: Possible problem with standard error calculation for Nearest Neighbor Statistic? https://community.esri.com/t5/spatial-statistics-questions/possible-problem-with-standard-error-calculation/m-p/301355#M1006 <HTML><HEAD></HEAD><BODY><SPAN>This is great.&nbsp; Thank you so much William for helping me understand the differences between the two equations.&nbsp; I guess what had me really confused was that the first paper had the equation for standard error, whereas the second had the equation for the standard deviation.&nbsp; I am still a little shaky on the derivation of this equation, but I understand it enough to implement it properly.&nbsp; Thanks again.</SPAN></BODY></HTML> Tue, 21 Dec 2010 17:44:22 GMT https://community.esri.com/t5/spatial-statistics-questions/possible-problem-with-standard-error-calculation/m-p/301355#M1006 WinnKetchum 2010-12-21T17:44:22Z