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If Error Bars Overlap Is the Data Significantly Different
Ive made this mistake. How to do error bars in Excel 2010 and 2007. Error Bars On Graphs However a difference in significance does not always make a significant difference. . The smaller the overlap of bars or the larger the gap between bars the smaller the P value and the stronger the evidence for a true difference. Reflect the uncer - tainty in the mean and its dependency on the sample size n sem. This is indicated by a line shaped line extending vertically from the top of a column on a graph as shown below. The type of soap used the amount of bacterial growth. Two 95 CIs can overlap yet can still indicate highly significant differences. If two SEM error bars do overlap and the sample sizes are equal or nearly equal then you know that the P value is much greater than 005 so the difference is not statistically significant. This is now counterintuitive since commonly you would assume that in the case of ov...


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