Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    0
    ReputationRep:
    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?

    also:

    how do i estimate the standard deviation of sample means?

    Thanks in advance for any responses!
    • Thread Starter
    Offline

    0
    ReputationRep:
    oh please someone help me
    • Thread Starter
    Offline

    0
    ReputationRep:
    anyone at all?
    Offline

    0
    ReputationRep:
    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
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    What's your favourite Christmas sweets?
    Useful resources

    Make your revision easier

    Maths

    Maths Forum posting guidelines

    Not sure where to post? Read the updated guidelines here

    Equations

    How to use LaTex

    Writing equations the easy way

    Student revising

    Study habits of A* students

    Top tips from students who have already aced their exams

    Study Planner

    Create your own Study Planner

    Never miss a deadline again

    Polling station sign

    Thinking about a maths degree?

    Chat with other maths applicants

    Can you help? Study help unanswered threads

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.