why sample is essential
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sample is essential so that we can know the pattern of that thing
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sampling method is essential.
1.a sample method must to represent all the characteristics of the Universe it is possible only when each unit of the universe stands equal chance of being selected in the sample .
2.all units of sample must be independent of each other .
3.the number of items in the sample should be fairly adequate so that some reliable conclusion are drawn covering the characteristics of the universe as a whole .
4.if more than one sample of selected from the universe this sample should be homogeneous to each other.
1.a sample method must to represent all the characteristics of the Universe it is possible only when each unit of the universe stands equal chance of being selected in the sample .
2.all units of sample must be independent of each other .
3.the number of items in the sample should be fairly adequate so that some reliable conclusion are drawn covering the characteristics of the universe as a whole .
4.if more than one sample of selected from the universe this sample should be homogeneous to each other.
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