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  • 18-03-2018
  • Mathematics
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A random sample means that: (a)every person has an equal chance of being selected (b) there is no pre-planning in the selection process (c) every person who is encountered is selected (d) researchers decide how many people of certain types they need in a survey

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Аноним Аноним
  • 18-03-2018
That would be the first option.
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