A researcher divides the populations into PG, graduates and 10 + 2 students and using the random digit table he selects some of them from each. This is technically called
| A. | stratified sampling |
| B. | stratified random sampling |
| C. | representative sampling |
| D. | none of these |
Answer : B Explanation : Division of population on the basis of class, income, education level etc is called stratification and every member of each stratum has equal chance of being selected by the researcher. In this way characteristics of various strata are identified and studied. |
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Option: A Explanation : Explanation will come here. Explanation will come here. Explanation will come here. Explanation will come here. Explanation will come here. |
