Why are ages rounded up on the 1900 US Census?
Before I post this question in the Indexing Group, I thought I'd ask it here because this little problem is so pervasive that there might be a reason for this other than errors by the indexers.
It has to do with the rounding up of ages that appear on the 1900 US Census but it applies only to those individuals born after the actual date of the census (June 1st). For example, an individual born in Dec 1895 is indexed as 5 years old but the actual data on the original form is correct in that it shows 4, the last birthday of that person.
This rounding up of the indexed age for those born after June 1st happens to 100% of the listings anywhere in the 1900 US Census, not just a few people or a few areas.
Surely not every single indexer made the same exact mistake and ignored the data on the record and arbitrarily rounded up the age. So there must be some sort of algorhythm going on here that supercedes the indexers' entries. Did I not get the memo about this or is there something else going on?
The head of the family is indexed with an age of 41 but on the actual document his birth date was entered as Sep 1869 and an age of 40
This anomaly continues through several of the children in this family, those born after June 1st.