2.5 Which of the following explains the essence of quote sampling ?  
   A     Each element of the population has an equal chance of being chosen 
   B     Every nth member of the population is selected J#H,QYnf(L   
   C     Every element of one definable sub-section of the population is selected ncadVheKt   
   D     None of the above 
   Answer:D  
展开全文