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comparison between two value in a sample, please help...
Posted:
Aug 16, 2012 5:29 AM


Hi there,
The following data is obtained from a longterm experiments. In the data set, ``Year'' is for sampling time, ``N'' is the tested property, and ``N.sd'' is the standard deviation of 3 times measurements of ``N'' of the same sample.
Year N N.sd 1952 561.7400 33.69357 1963 709.0100 27.84428 1976 713.1600 33.20421 1998 755.3533 57.29368 2008 865.0033 51.11501
Now I hope to test whether the variation between different year is significant or not. For example, does ``N'' in 1952 significantly differ with that in 2008?
However, because of the historical reason, the experiments did not set replications. And the ``Year'' here is a continuous variable. So, the tradition ANOVA can not be applied here. Is there any method that I can apply in this situation?
Any suggestions will be really appreciated. Thanks in advance.
Regards, Jinsong



