The Errors of Error Bars

Because you are never completely right.

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Five people and five trials for the win

The five by five rule (Five samples and five trials with each sample) gives a good sample to measure the range for the error bars with.
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"Oh error bar, what great range you have."

The error bar represents the range of data of the five trials for each person.
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"My hat looks cool but it doesn't have a lot of range."

You graph the mean and the error bar represents the range
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"This out-liar is kind of ruining our image."

- If the error bar is too high above the mean, that means that the sample is an outl-liar and most likely an untrustworthy piece of data.