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What do you mean by sample, population and the variable of interest of a data set? b

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What do you mean by sample, population and the variable of interest of a data set? b. Pollsters regularly conduct opinion polls to determine the popularity rating of the current Prime Minister. Suppose a poll is to be conducted tomorrow in KPK, In 1which 2000 Individuals will be asked whether the PM is doing a good or bad Job. The 2000 Individuals selected by random-digit telephone dialing and asked the question over the phone: i. What is the relevant population in this situation? ii. What is the variable of interest? Is it quantitative or qualitative? iii. How to make decision based on the sample of 2000 individuals?