It is called convenience sampling.
The answer depends on the underlying variance (standard deviation) in the population, the size of the sample and the procedure used to select the sample.
simple random sampling method
The chief aim is to find a representative sample; that is, a sample which reflects the properties of the population, as a whole.
The sampling universe is the totatility of items/events from which you can select or sample for statistical analysis and description.
simple random sample is to select the sample in random method but systematic random sample is to select the sample in particular sequence (ie 1st 11th 21st 31st etc.)• Simple random sample requires that each individual is separately selected but systematic random sample does not selected separately.• In simple random sampling, for each k, each sample of size k has equal probability of being selected as a sample but it is not so in systematic random sampling.
to select a random sample you pick them at random
It depends on the what the sample is for, but at least get both girls and boys in the sample.
The main difference between the quota and stratified sampling is that in the stratified sampling the researcher can not select the individuals to be included in the sample (he doesn't have control over who will be in the simple), but in the quota sampling the researcher has control over who will be in the sample (he can contact certain people and include them in the sample).
To conduct a survey with a sample size of 3/8, you would need to select 3 out of every 8 individuals in your population to participate in the survey. This can be done by using a random selection method or by dividing your population into groups of 8 and selecting 3 individuals from each group.
Psychologists might select a sample for a survey using various methods, including random sampling, where every member of a population has an equal chance of being selected, or stratified sampling, which involves dividing the population into subgroups and sampling proportionally from each. They may also use convenience sampling, selecting individuals who are easily accessible, or purposive sampling, targeting specific groups relevant to the research question. The choice of method depends on the study's goals, the population of interest, and the resources available. Ensuring a representative sample is crucial for the validity of the survey results.
Instructions for the LaserWriter Select 360 printer can be obtained from preterhuman online and from many second hand printer/hardware shops sourced locally.
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no
The answer depends on the underlying variance (standard deviation) in the population, the size of the sample and the procedure used to select the sample.
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simple random sampling method
The chief aim is to find a representative sample; that is, a sample which reflects the properties of the population, as a whole.