like they cannot ask everybody in the town or place or every subject
to fill in so how can they be accurate
2006-11-20 12:23:50 · 2 answers · asked by Uganda 1 in Politics & Government ➔ Other - Politics & Government
Sampling is that part of statistical practice concerned with the selection of individual observations intended to yield some knowledge about a population of concern, especially for the purposes of statistical inference. In particular, results from probability theory and statistical theory are employed to guide practice.
The sampling process consists of 5 stages:
* Definition of population of concern
* Specification of a sampling frame, a set of items or events that it is possible to measure
* Specification of sampling method for selecting items or events from the frame
* Sampling and data collecting
* Review of sampling process
2006-11-20 12:31:56 · answer #1 · answered by DanE 7 · 0⤊ 0⤋
some are on random dialed telephone numbers, they just ask the person if they are willing to participate. I have done several like this.
2006-11-20 20:25:57 · answer #2 · answered by Tact is highly overrated 5 · 0⤊ 0⤋