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I don't really think that information is necessary. The mark scheme doesn't even mention it.
Anyways, the t-test just tells you that there is a significant difference between the two values. It does not tell you WHY they are different. So you can't prove the assumption just by saying "well, the t-test says so"
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Anyways, the t-test just tells you that there is a significant difference between the two values. It does not tell you WHY they are different. So you can't prove the assumption just by saying "well, the t-test says so"