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    Hi guys,

    Usually such questions are 4 markers and ask you to evaluate a claim made by somebody on a certain study given in the question. I was just wondering what's the best way to approach these questions?

    Usually the general statement of Correlation doesn't prove causation and another factor (e.g) may be affecting the results picks you up two marks. But then I get slightly stuck and don't know where to pick ideas from. How do you guys go about such questions?


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    Can you give an example to illustrate your question.

    If its something like using nitrogen fertilizers in soil that supports pseudomonas is not effective, why, then w can asuume that its the pseudomonas that causes the problem. And then we can just formulate the hypothesis that pseudomonas does something to reduce nitrate efficiency. That's denitrification. Of course its a paltry example but i need a question to answer.


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    Hmm, lets say your given a set of data for how a father smoking affects the chance of his child developing a disease and then a journalist claims that 'if a father smokes then his child develops more diseases', evaluate?


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    Wrll, you have to take two situations, one in which the father smoked and one in which he didnt. Data may also differ. Now we have to evaluate the statement of the journalist. He claims that diseases occur more when father smokes. We analyse each situation separately. The child is not an active smoket,but a passive one. Chances are that he will adopt smoking and fall prey to cancer or cardiovascular disorder. Or he might remain a pasdive smoker and end up with lung cancer. In our control group, the chances of passive snoking and hence diseases are less. Also
    This depends on genetic makeup.

    Hope this helps:getmecoat:
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