What is random sampling

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Nirmala Devi C

Nirmala Devi C (Querist)

02 February 2011 Pls explain random sampling and
pls give the format of random sampling

RAMESH KUMAR VERMA

RAMESH KUMAR VERMA (Expert)

02 February 2011 Here's an example. A woman walks into the shop. She sees a Chanel perfume bottle section. She takes out any perfume from the section and tries it on, ( without buying, just sample).

IN ANOTHER EXPLAIN:-
A sample is a subject chosen from a population for investigation. A random sample is one chosen by a method involving an unpredictable component. Random sampling can also refer to taking a number of independent observations from the same probability distribution, without involving any real population. The sample usually is not a representative of the population from which it was drawn— this random variation in the results is known as sampling error. In the case of random samples, mathematical theory is available to assess the sampling error. Thus, estimates obtained from random samples can be accompanied by measures of the uncertainty associated with the estimate. This can take the form of a standard error, or if the sample is large enough for the central limit theorem to take effect, confidence intervals may be calculated.

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