595 Words3 Pages

Sampling
Carrying out a survey of every single potential consumer (known as
population) of a firm's product would be impractical, time-consuming
and costly. Businesses still, however, need to collect enough primary
data to have a clear idea of the views of consumers. This can be done
by taking a sample of the population. This sample group should be made
up of consumers that are representative of all potential buyers of the
product. There are a number of ways in which a sample can be chosen.
Random Sampling
This method gives each member of a group an equal chance of being
chosen. In other words, the sample is selected at random, rather like
picking numbers out of a hat. Today computers can be used to produce a
random list of numbers which are then used as the basis for selecting
a sample. Its main advantage is that bias cannot be introduced when
choosing the sample. However, it assumes that all members of the group
are the same (homogeneous), which is not always the case. A small
sample chosen in this way may not have the characteristics of the
population, so a very large sample would have to be taken to make sure
it was repetitive. It would be very costly and time consuming for
firms to draw up a list of the whole population and then contact and
interview them.
One method sometimes used to reduce the time taken to locate a random
sample is to choose every tenth or twentieth name on a list. This is
known as systematic sampling. It is, however, less random.
Stratified Random Sampling
This method of random sampling is often preferred by researchers as it
makes the sample more representative of the whole group. The samp...
... middle of paper ...
... a street within
a city may be chosen and then a particular household within a street.
Snowballing
This is a highly specialised method of sampling. It involves starting
the process of sampling with one individual or group and then using
these contacts to develop more, hence the 'snowball' effect. This is
only used when other sampling methods are not possible, due to the
fact that samples built up by snowballing cannot be representative.
Firms operating in highly secretive businesses such as the arms trade
may use this method of sampling. Similarly, firms engaged in producing
highly specialised and expensive one off products for a very limited
range of customers may need to rely upon snowballing when engaged in
market research. Examples might include firms engaged in nuclear and
power generating industries.

Related

## Sampling And Methods Of Sampling

1811 Words | 8 PagesThis memo would be an overview of sampling, starting with the definition of what sampling is, when and how it is used ranging to the discussion of different types of sampling and the risks related to them. The memo will also discuss the steps involved with sampling and the role of sampling in auditing including the attributes sampling and the variables sampling. Sampling is to draw a conclusion efficiently about a population of interest by testing the acquired assurance on a subset of that population

## Sampling Methods And Sampling Method

1305 Words | 6 PagesThere are many sampling methods and each of sampling method has its advantages. Researchers need to select well of the sampling method to improve the data quality and overall results quality. There are a pool of sampling methods to choose from including simple random sampling, stratified sampling, systematic sampling and cluster sampling (Oulte, 2011). Each sampling method can be applicable at different situations and times. For simple random sampling, it is more suitable applying for when the whole

## Sampling, Sampling And Quota Sample

726 Words | 3 Pagesgeneral sampling methods used in statistics: representative sample, random sample and quasi-random sample, stratified and quota sample, convenience sample, and purposive sample. A representative sample should be unbiased and thus properly indicate a characteristic of the entire population. In a random sample nothing is biased; in other words, every individual, thing or event in the population has the same chance of being selected for the sample. Therefore, because of the randomness of the sampling, the

## Sampling Methods

2051 Words | 9 PagesSampling is the framework on which any form of research is carried out. A suitable sample that meets the inclusion and exclusion criteria of a research design must be chosen from a given population to carry out studies. In this essay comparison is made between stratified random sampling and convenience sampling. The population on which the researcher is interested in carrying out his or her research may be too large, therefore a suitable sample which can represent the population in correct proportion

## Sampling Methods

1031 Words | 5 PagesSampling Methods A great deal of sociological research makes use of sampling. This is a technique aiming to reduce the number of respondents in a piece of research, whilst retaining - as accurately as possible - the characteristics of the whole group. The purpose of taking a sample is to investigate features of the population in greater detail than could be done if the total population was used, and to draw inferences about this population. In addition, at the

## Sampling Method Using Sampling Technique

732 Words | 3 PagesSampling Technique The sampling method used in this experiment was transect sampling. Six evenly spaced transects were selected for this study, with three on each side of the path. Each group was assigned one transect to collect samples along various points. Transects were approximately 50m in length. Samples were taken at three different points along each transect, at 5m, 30m, and 50m. At the first point of sampling at 5m, 4 beat samples were taken, and 2 pitfall traps were set about 1 meter

## Sampling Techniques

472 Words | 2 PagesSampling Techniques A sampling procedure that assures that each element in the population has an equal chance of being selected is referred to as simple random sampling .Let us assume you had a school with a 1000 students, divided equally into boys and girls, and you wanted to select 100 of them for further study. You might put all their names in a drum and then pull 100 names out. Not only does each person have an equal chance of being selected, we can also easily calculate

## Sampling Analysis

850 Words | 4 PagesSampling is a means of obtaining a discrete data set from an analog or continuous signal of interest. This is commonly done digitally by computers and multimeters. Some important considerations are sampling rate, resolution, range, and the family of variables that are related to these. 1) Sample rate corresponds to a frequency, sampling frequency that is a measure of how frequently a signal of interest is measured. In the most common case the signal of interest is time-dependent, the sampling

## Sampling : The Process Of Sample

721 Words | 3 Pagesknown as sampling, is a process. Samples are the results of the process. When sampling, there are three important things to remember including staying unbiased, collecting a large sample, and minimizing the sampling errors. First, if you focus on staying unbiased, that will further help you realize that it is solely off of your parameter estimate which cannot be too high or too low. The closer to the center of the true parameter value, the more unbiased you will be during the act of sampling. Second

## Chlorine Sampling Techniques

1317 Words | 6 PagesChlorine Sampling Techniques The OSHA sampling and analytical method for chlorine is discussed in reference 9.1. The principle of sampling is described in reference 9.2. The analytical procedure is based on an iodometric technique which uses a residual chlorine electrode (RCE) for detection (9.3.). The validation of the chlorine method consisted of the following experimental studies: Analysis of a total of eighteen samples (six samples at each of the three test levels) which were prepared

### Sampling And Methods Of Sampling

1811 Words | 8 Pages### Sampling Methods And Sampling Method

1305 Words | 6 Pages### Sampling, Sampling And Quota Sample

726 Words | 3 Pages### Sampling Methods

2051 Words | 9 Pages### Sampling Methods

1031 Words | 5 Pages### Sampling Method Using Sampling Technique

732 Words | 3 Pages### Sampling Techniques

472 Words | 2 Pages### Sampling Analysis

850 Words | 4 Pages### Sampling : The Process Of Sample

721 Words | 3 Pages### Chlorine Sampling Techniques

1317 Words | 6 Pages