I hope you can help me with a simple method to account for serial coorelation when running ANOVA and comparing the means for the three treatments. I also tried the sub-sampling technique which did not work either. The AR (1) model which normally used to account for serial correlation in regression analysis did not work in my case. Serial correlation of lag one was to be around 0.8-0.9 for each data set.īefore going to the next step and running ANOVA test to check the variances and means of the three data sets, I need to remove the serial correlation. According to DW test, and plotting the residuals and also PACF showed that there is serial correlation. I checked those methods to see if there is any serial correlation within each group of observation. They were measured in two-day interval for a one-year period. I am checking whether there are any significant differences among the means of soil water data collected from these three hillslopes (the hillslopes are the treatments here). I have three time series of Soil water data from three different Hillslopes.
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