Question

Topic: Research/Metrics

Sample Choice?

Posted by Anonymous on 3/1/2004 at 7:00 AM ET 250 Points
good morning,
i'm marketing french student.
Apart from my qualitative and quantitative researches. I would like to make "little" satisfaction study for the company that sponsors me.
The segment I want to study has a population of 250 persons in 2003. Do I have to study this whole population or can i take a sample? In that case could you tell me the size of the sample i should take?
many thanks.
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RESPONSES

  • Posted by Blaine Wilkerson on 3/1/2004 at 8:45 AM Member
    Since the number is small, I would try to survey all of them for the most accurate results.

    If that is not possible, either determine how much you can handle and calculate a sampling error, or determine the amount to sample by deciding how much error is acceptable.

    Here is a cool site that has a ton of info for you to use:

    https://www.epa.gov/customerservice/feedback/voice.htm

    Good marketing question! Reminds me of my old statistics class!

    - Jett Enterprises, Inc.
  • Posted on 3/1/2004 at 11:24 AM Accepted
    To have a sample with a maximum sampling variability of +/-5 at the 95% confidence level you would need to RANDOMLY survey 151 of your 250 customers.
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