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    Quite a simple question, how does S3 stand in comparison with S1 and S2?

    Have done the latter two, considering self-studying S3. Statistics are quite nice and will be quite a good preparation for Economics at university (I think).

    Um, so, has anyone in here done all three and wouldn't mind sharing his/her thoughts?
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    I've done it with WJEC, but they are very similar (S1 and S2 cover the same topics, just in a different order).

    Sampling and populations is quite easy to understand.
    Estimators are a nice topic.
    You cover hypothesis testing again, but you need to calculate your own standard deviation using the formula for the standard deviation of a sample.
    Regression is easy too. Just plugging numbers into a formula, I think.

    So it's okay to self teach, as long as you understand the distributions and methods of hypothesis testing you have previously been taught.

    The only thing I don't know about is the congruency tables topic. No idea what that is.
    Instead, I was taught all about the student t-distribution. Yay!
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    Oh, cheers lot, shouldn't be that bad then
 
 
 
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Updated: February 2, 2010
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