Question: 6. Stratified sampling: Question 6 options: a) there is no pre-planning in the selection process. b) a step within random sampling in which find the

6. Stratified sampling: Question 6 options: a) there is no pre-planning in the selection process. b) a step within random sampling in which find the population of the nation divided into fourths and certain areas with the regions are selected as representatives of the national population. c) every person in the target population has an equal chance of being selected. d) researchers decide how many persons of certain types they need in the survey

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