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Sheela4875 Sheela4875
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6 years ago
Sending a questionnaire by email
 
  a. is useful for geographically dispersed samples.
  b. is inexpensive.
  c. is good for large samples.
  d. raises the question of coverage error.
  e. all of these
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Slim1928Slim1928
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Sheela4875 Author
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6 years ago
So very smart
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