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Ans Census - this is when the entire population of interest is surveyed for the purpose of data analysis A census is appropriate when 1 The population of interest is small for example a satisfaction survey for a new course as the class is a relatively small number of people all can be surveyed 2 The relevant data for the entire population is readily available for example government statistics which draw on census data Q 2 For each of the following sampling techniques illustrate a business example where it could be used fully explain why the particular technique would be suitable in each case i Simple random sampling Ans Samples selected form the population using some random process Every member of the population has the same chance of being selected This is only a viable method when a sample frame is available For example the CIE travel company has in the past sent out surveys asking people questions about the amount of travelling they do on a regular basis the sample for this survey was selected at random from all those on the electoral role ii Stratified sampling Ans Population is broken into strata eg age or size of company and then a random sample is taken from each strata Mori MRC conducted a survey for a software firm to evaluate the performance of an accounting package They took random samples from small medium-sized and multi-national companies who are presently using this software This enabled them to see what adjustments were needed to cater for their clients in each of these strata iii Cluster sampling Ans Cluster sampling is where the researcher first identifies large clusters of people like a whole village or district and then samples people within these clusters For example when Guinness produced their beer Breo it was first tested on a sample in the Dublin area in this case Dublin was the cluster for surveying on a beer which was
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