Statistic unit 3 DB

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The first question is "Are you going to analyze your data by the entire sample or do you plan on a more detailed examination of subgroups within the sample?" In the context of the job satisfaction survey, this means whether we are treating the employees as a unified group or are interested in analyzing the variations in job satisfaction with respect to the qualitative variables like gender or department...
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The second question is "? How accurate do you want your results to be?" The greater the accuracy required the larger is the sample size needed. An example of the specification of accuracy is ± 5% at a 95% confidence interval. This means that if 100 samples are drawn in 95 cases the results would be within plus or minus 5%...
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