researchers often use sampling methods to mea...
researchers often use sampling methods to measure a population. for example, to measure presidential approval ratings, polling firms will call a random sample of the population and ask them to express their views on the president in one way or another. a. why is it reasonable for a firm to collect just one sample to represent the population using known data? b. data aggregators collect and analyze data from many polling firms. can data aggregators improve on the work done by the polling firms? why or why not? b. data aggregators are able to construct a sampling distribution by combining multiple samples since more and more samples are taken into account. their sampling distribution has a that approaches the approximate the . glossary math tools review progress clear all check answer