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palacir999 palacir999
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6 years ago
To overcome one of the shortcomings of telephone surveys due to unlisted telephone numbers:
 a. survey takers purchase mail lists of unlisted telephone number subscribers.
  b. survey takers employ random digit dialing facilities.
  c. survey takers contact telephone companies for a list of unlisted telephone numbers.
  d. survey takers purchase lists of unlisted telephone numbers from magazine subscribers.
  e. survey takers go door to door and identify the unlisted telephone subscribers.
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wpingwping
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6 years ago
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palacir999 Author
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6 years ago
Good timing, thanks!
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Yesterday
this is exactly what I needed
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2 hours ago
Thanks for your help!!
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