Sentence examples for based on haphazard sampling from inspiring English sources

Most analyses to date have been based on haphazard sampling of fields and seed stocks in a restricted number of localities; results are not representative of a well-defined population.

Despite this grim picture, school officials say, the current teacher evaluation system — based on haphazard observations by administrators — rates 95 percent of the district's teachers as "effective".

He observed, "It takes time for a teenager to realize that a relationship isn't just an infatuation based on haphazard attraction, but an entity on which two people with compatible personalities work together".

This type of connectivity has been considered in a more recent model based on "haphazard wiring" (Ringach 2004, 2007).

It encompasses word of mouth, hopeful guessing through past experiences with a given brand and wild speculation based on a haphazard sampling of the copious Internet reviews at various Web sites.

Nielsen calculates a network's overall viewership based on a sampling of about 13,000 households nationally.

Based on random sampling.

They want to see the science here move forward based on good sampling strategies, large samples, etc".

Most polls, including the ones noted above, are based on new samples for each new poll.

For results based on this sample of 2,736 registered voters, the maximum margin of sampling error is +/-2 percentage points.

Because the survey was not based on a probability sample, there is no sampling error available.