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lect13 - Two Surprising Properties of Sampling Game III and...

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Two Surprising Properties of Sampling Game III, and Sampling Variation Outline Two Surprising Properties of Sampling The Literary Digest Case Game III, and Sampling Variation 1 / 10 ISOM 2500 Lect 13: Samples and Surveys
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Two Surprising Properties of Sampling Game III, and Sampling Variation Motivating Cases Case 1: J.D.Power and Associates (a global marketing information services company) provides, among other things, the customer satisfaction rating for cars. – How do they find out how the owners of a specific model of cars like their cars? Case 2: Before accepting a shipment of electronic components, the foreman of a warehouse wants to make sure that the vast majority of the components in the shipment operate correctly. – How to find out the proportion of components in the shipment that operate correctly? Case 3: Before determining the salary for a new employee, the managers in the human resources department want to know the salaries paid for this type of work around the country. – Can one get the salaries offered by every employer for this type of work around the country? If no, then what can one get? 2 / 10 ISOM 2500 Lect 13: Samples and Surveys
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Two Surprising Properties of Sampling Game III, and Sampling Variation Population and Sample In all the examples above, we’re interested in knowing some characteristics of a population: Population : the entire collection of interest Case 1: population = all the owners of a specific model of cars Case 2: all the components in the shipment Case 3:
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