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A political scientist wants to know how college students feel about the Social Security system. She obtains a list of the 3245 undergraduates at her
A political scientist wants to know how college students feel about the Social Security system. She obtains a list of the 3245 undergraduates at her college and mails a questionnaire to 238 students selected at random. Only 100 questionnaires are returned.
What is the size of the sample?
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