The word 'subsample' is correct and usable in written English.
It is usually used in fields such as statistics, where it means to select a smaller part of a larger dataset for further analysis. For example, "We took a subsample of the data for further analysis."
This is a much smaller, but still representative, subsample with an often finer particle size, from which test portions are selected for specific analyte determinations.
Heuristic methods exist in which only a subsample of all possible trees is examined and thus an exhaustive search is avoided.
They carved out a subsample from 30,000 dewormed children and tracked down more than 5,000 young adults.
Like other polls, the Current Population Survey is subject to sampling error, a result of collecting data among a random subsample of the population rather than everyone in the state.
There was no statistical difference between the number of men (32 percent) and the number of Tea Partiers (37 percent) that would support it; the subsample of Tea Party members was 186, so the margin of error there is greater: plus or minus 7 percentage points.
Betchkal also listens to a subsample of the recordings.
The laboratory sampling constant, K, is then calculated:K = R2w,where K is the sample weight that produces a 1 percent subsampling error at a confidence interval of 68 percent.
In the trace concentration realm the use of such small test portions on even moderately heterogeneous solids can lead to a high subsampling error.
If a different test portion weight, wo, is used, then the expected subsampling error, Ro, is given byRo = (K/wo)1/2.These relationships, while linked to the specific analyte and test sample, are independent of the test methodology employed.
Some analysts are always trying to unlock the Da Vinci Code by looking at the demographic subsamples in polls – a noble idea in theory, but a problematic one in practice (indeed, I think it is often counterproductive) because the demographic subsamples in polls are subject to considerably more statistical noise than the top-line results.
That is in making too much of demographic or geographic subsamples within a poll.
