You need to create a heterogeneous mix based on the criteria you deem important.
Because without representative sample, your results will not be valid.
A sample that accurately reflects the characteristics of the population as a whole
Take a simple random sample.
Well, if your sample does not represent the larger sample, you'll certainly not get a valid result ... For example, if you're studying pregnancy and your sample includes men - The whole idea of "representative' sample is fuzzy and often gives interesting errors.
A representative sample is one where the statistics of the sample are the same as the statistics for the parent population.
A sample is any subset of the total population. A representative sample is one that is chosen so that its characteristics are similar to that of the population.
Many statistical statements for a population which are based on a sample are not valid if the sample is not representative.
A representative sample is a randomly selected subset of the population.
Because without representative sample, your results will not be valid.
A simple random sample.
The likely word is representative (someone chosen to act in one's place).The adjective representative means having the same qualities of a group or whole.(e.g. a representative sample)A less-likely possibility is the word repetitive, meaning repeated.
It is called a representative sample.
A sample that accurately reflects the characteristics of the population as a whole
That the key characteristics of the population are reflected in the sample.
Take a simple random sample.
Well, if your sample does not represent the larger sample, you'll certainly not get a valid result ... For example, if you're studying pregnancy and your sample includes men - The whole idea of "representative' sample is fuzzy and often gives interesting errors.
A representative sample is one where the statistics of the sample are the same as the statistics for the parent population.