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  1. W

    How was Mathematics Paper 72 (Statistics 2)?

    I don't recall getting any standard deviation in S2 that was greater than the mean. But oh well, we'll have to wait till the marking scheme is out to decide that. :)
  2. W

    How was Mathematics Paper 72 (Statistics 2)?

    How can you get 30,000 as variance? That makes the mean 150, and standard deviation 173.2 (if variance = 30,000). Do you really think the standard deviation can be greater than the mean? Think again. :)
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