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    Paired or Unpaired T-test?

    If I have traps set to capture a certain animal at night vs. during the day, would I use a paired or unpaired T-test? I'd be comparing the mean number of species 1 collected during the day with the mean number of species 1 collected at night (using the same trap). Each individual animal is...
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    Separate Error Bars in SigmaPlot12

    I'm having an issue inserting asymmetric error bars into a grouped bar graph on SigmaPlot version 12. The SEM is already calculated for each "bar" on the graph and I have a column with the SEMs right next to the column with the means. The information I found for creating asymmetric error bars...