Can't tell you specifically, but it sounds like you have a relatively high proportion of infant deaths with no sex specified. So you get a bunch of zeros included in the overall average that are not included in the male/female averages.
I don't think an individual is included in the averages at all if either the birth date or the death date is missing. However, a christening date might be used in place of a missing birth date, and a burial date might be used in place of a missing death date. -----Original Message----- From: David Newton [mailto:[email protected]] Sent: Monday, December 16, 2013 6:05 AM To: [email protected] Subject: [LegacyUG] Lifespan, and other, statistics Could one of you explain to me how the statistics are calculated? In my family file the average lifespan by century never exceeds 17 years whereas the average male and female lifespans are around 53 and 48 respectively. These figures seem to be inconsistent with each other but in the absence of how the calculations are done I cannot be sure what it is telling me. David Legacy User Group guidelines: http://www.LegacyFamilyTree.com/Etiquette.asp Archived messages after Nov. 21 2009: http://www.mail-archive.com/[email protected]/ Archived messages from old mail server - before Nov. 21 2009: http://www.mail-archive.com/[email protected]/ Online technical support: http://www.LegacyFamilyTree.com/Help.asp Follow Legacy on Facebook (http://www.facebook.com/LegacyFamilyTree) and on our blog (http://news.LegacyFamilyTree.com). To unsubscribe: http://www.LegacyFamilyTree.com/LegacyLists.asp Legacy User Group guidelines: http://www.LegacyFamilyTree.com/Etiquette.asp Archived messages after Nov. 21 2009: http://www.mail-archive.com/[email protected]/ Archived messages from old mail server - before Nov. 21 2009: http://www.mail-archive.com/[email protected]/ Online technical support: http://www.LegacyFamilyTree.com/Help.asp Follow Legacy on Facebook (http://www.facebook.com/LegacyFamilyTree) and on our blog (http://news.LegacyFamilyTree.com). To unsubscribe: http://www.LegacyFamilyTree.com/LegacyLists.asp
