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  1. P

    Test whether temperature of water has an effect on the amt. of CuSO4 that can be

    dissolved in it? Ideas to design an experiment :)
  2. P

    Statistic/Biology : Standard Deviation question?

    A useful rule is that 68% of the values lie within one standard deviation of the mean in a normal distribution... So let say i have my graph and it (sort of) has a normal distribution. Where is this -1.0 and +1.0 std. deviation thing? I don't get it and where's my 68% of values? Explanation...
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