Status:Closed    Asked:Jul 17, 2017 - 08:59 PM

what does "1-in-100 national random sample of the population" specifically mean? what is the interpretation?

So most of the ACS samples from 2000 to 2015 are said to be "1-in-100 national random sample of the population". What does this exactly mean/imply about the sample?

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Staff Answer


Jeff Bloem


This shows how large the sample is relative to the total size of the population. For most recent US census years, a 1-in-100 random sample of the population means that the sample is approximately 1% of the size of the total population. Additionally, although this varies based on demographics, in a 1-in-100 random sample each person - on average - represents 100 people in the total sample. Practically, what this means is that you'll need to use the sample weights (PERWT or HHWT) if you wish to calculate nationally representative statistics.


Jul 18, 2017 - 09:08 AM

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about sample size
total population from 2000 census 5% sample
What's the diff between ACS and 1% sample in year 2000? Is ACS 2016 & 1% 2000...
comparing 5% 2000 ACS and 2015 1% ACS Metro-Area Populations
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