Mathematics · Statistics
Which of the following statements regarding sampling methods are CORRECT? A. If observations are selected purposively, it is called a method of non-random sampling. B. If observations are selected in an ad-hoc manner, it is called a method of non-random sampling. C. If observations are selected in a systematic manner, it is called a method of non-random sampling. D. If observations are selected on the basis of judgment, it is called a method of non-random sampling.
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- 1Only A, B and C
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Only A, B and D
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