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    (Original post by nisha.sri)
    Which exam board do you do ?
    Edexcel and I'm really nervous that's why am double checking everything 😭
    Also I covered the whole course but I still get questions wrong and I think it's the wording
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    (Original post by Amnotsure)
    Yh but quicker to analyse or easy to analyse want there so......
    If you do Edexcel then it says
    quicker - to collect data
    Cheaper
    People can give a more considered response
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    (Original post by stoyfan)
    It isn't but it should be a reference point to where the pattern of the bell shape should end and start (flatten out). My teacher said that they would be precisely seeing if your graph is correct, but they will see if the graph flattens our at the correct point.
    Oh ok so is that for every graph ?!
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    So what stoyfan are you going to say if advantages of a questionnaire comes up?
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    (Original post by wenqi.s)
    Aww... Hope you get an A* in the real one!! Are you doing it tomorrow??
    Thanks and yh.
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    (Original post by Amnotsure)
    Yh but quicker to analyse or easy to analyse want there so......
    Screenshot the mark scheme and the question. It just has to be multiple choice unless the answer was the only approapiate answer for the question .

    FOR EXAMPLE: Jeff is making a survey. He needs to ask lots of people. What advantage of a questionnaire would really help Jeff?
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    (Original post by Amnotsure)
    Edexcel and I'm really nervous that's why am double checking everything 😭
    Also I covered the whole course but I still get questions wrong and I think it's the wording
    I do the same board as you
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    My iPad doesn't screen shot it's 2013 paper question 3
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    (Original post by Amnotsure)
    So what stoyfan are you going to say if advantages of a questionnaire comes up?
    I will put. Cheaper
    Easier
    You are able to get large numbers of participants easily
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    (Original post by Amnotsure)
    So what stoyfan are you going to say if advantages of a questionnaire comes up?
    Lol are you trying to go against stoyfan ?!
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    Can someone please help me on distribution of standard deviation graphs? Like when it's normal and percentages and things? And also when to use each formula and it's just all so confusing, and how it overlaps with the mean? Would be much appreciated x
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    (Original post by nisha.sri)
    I do the same board as you
    It's easier than aqa which is good 😊
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    (Original post by Amnotsure)
    My iPad doesn't screen shot it's 2013 paper question 3
    The question is :
    State one advantage and one disadvantage of using a questionnaire rather than a face to face interview.

    Adv - Cheaper
    Disadvantage - Questions cannot be explained if they are not understood
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    (Original post by nisha.sri)
    Lol are you trying to go against stoyfan ?!
    You said it's quicker to collect the data and it's cheaper right, I think I miaht use that thank for the help much appreciated
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    (Original post by nisha.sri)
    The question is :
    State one advantage and one disadvantage of using a questionnaire rather than a face to face interview.

    Adv - Cheaper
    Disadvantage - Questions cannot be explained if they are not understood
    The disadvantages are easy it's just the advantages also do you know an advantage of systematic sampling
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    (Original post by Amnotsure)
    The disadvantages are easy it's just the advantages also do you know an advantage of systematic sampling
    Advantage systematic sampling :
    Easy to compare and understand - that's what it says on the internet
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    (Original post by Crabber25)
    Can someone please help me on distribution of standard deviation graphs? Like when it's normal and percentages and things? And also when to use each formula and it's just all so confusing, and how it overlaps with the mean? Would be much appreciated x
    Normal distribution is a bell shape line. Below that it is like the population.

    68% of population is covered by SD 1/-1
    95% is covered by SD 2/-2
    99% is covered by SD 3/-3

    Mean is the peak of the bell.
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    (Original post by stoyfan)
    Normal distribution is a bell shape line. Below that it is like the population.

    68% of population is covered by SD 1/-1
    95% is covered by SD 2/-2
    99% is covered by SD 3/-3

    Mean is the peak of the bell.
    You are a hero! Is that all I need to know about S.D?
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    I really need to go because I am spending too much time on this website than actual revision.

    Best of luck for everyone who is taking the test.
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    https://en.wikipedia.org/wiki/Normal...rical_Rule.PNG

    not really. Here is a diagram of it of how it should look like incase you were to draw one.
 
 
 
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