2/10/2024 0 Comments Logger pro uncertainty bars![]() This can determine whether differences are statistically significant. These quantities are not the same and so the measure selected should be stated explicitly in the graph or supporting text.Įrror bars can be used to compare visually two quantities if various other conditions hold. Error bars often represent one standard deviation of uncertainty, one standard error, or a particular confidence interval (e.g., a 95% interval). They give a general idea of how precise a measurement is, or conversely, how far from the reported value the true (error free) value might be. ![]() This should be essentially the same thing in MS Excel, but I gave up MS Office for the new year, so I can't show you that.Graphical representations of the variability of data A bar chart with confidence intervals (shown as red lines)Įrror bars are graphical representations of the variability of data and used on graphs to indicate the error or uncertainty in a reported measurement. Use the values as indicated in the above picture and you should get something like this: Now right click (secondary click) on one of the data points. Next, double click on the graph to make it "active". I opted to not have data point labels and just had the line. Be sure it is an "x-y scatter" and not "line" - see how good Open Office is? They even use the dumb names that Excel uses for types of graphs. I just tested this out and the error that I used before would be too small, so I made it larger. The first step is to put the data in - easy enough. I have actually never done this in Open Office 3, but I did sleep in a Holiday Inn Express. You can put error bars for both x- and y-data, but I just did y-data here for an example. The error bars look small, but that is often how it turns out. Here is the final thing (again, no titles and stuff). Choose the column "Data Set|error" - or whatever you called it.Check the button that says "use column".Check the box that says "Error Bar Calculations". ![]()
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