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    • Thread Starter

    I'm not very good at the wordy stuff. the question is as follows:

    there is an area witth a population of 400,000.
    A city newspaper has a circulation of about 10,000 within this area
    it wants to find out what residents think about shopping facilities in the city
    enclosed in the newspaper is a questionnaire
    it asks readers to complete it and return it to the newspaper's offices.
    1000 replies are received, 70% of which are from women

    which statements apply in this case:

    A) the population from which the sample is drawn is not the relevant one for purpose described

    B) the response rate is low

    C) there will be a high rate of response errors in the survey

    D) the survey does not use a random sample

    I said A) and D) because A) only asks readers of the newspaper, so only a certain type of people would be resonding, not a random sample.

    D) because of the same reason as A) really. any thoughts?


    how do i estimate the standard deviation of sample means?

    Thanks in advance for any responses!
    • Thread Starter

    oh please someone help me
    • Thread Starter

    anyone at all?

    you are correct about it being A and D.
    You want to find out sample means,
    I think you are referring to s^2 which = n/(n-1) x (standard deviation)^2
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