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When Survey Weights Are Unnecessary

One week after Cambrian Park was released, Delimited Pictures gathered a survey of people who watched it and asked them whether or not they liked the film. Delimited Pictures put significant effort into catering to a younger female audience - individuals who had the least positive reaction to Cambrian Park's prequel, Neoproterozoic Park. If Delimited Pictures is just interested in whether female college students in Los Angeles seemed to enjoy Cambrian Park, do they need to use survey weights to poststratify their sample?

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