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What kind of a sample must be used for statistical analysis?(a) A random sample(b) A sample having excessive representation of a relation(c) A sample having suppressive representation of a relation(d) None of the mentionedI have been asked this question in an interview for internship.This is a very interesting question from Estimating Statistics of Expression Results topic in portion Query Processing and Optimization of RDBMS |
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Answer» Correct option is (a) A random SAMPLE |
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