GraphPad Prism 8 User Guide

Improvements with error bars

Improvements with error bars

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Improvements with error bars

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New error bar calculations

When plotting medians, Prism offers a new choice of error bars: Median with 95% CI

When plotting the geometric mean, Prism now offers to plot error bars showing the geometric SD. It also shows the geometric SD factor on the Column statistics results page.

New warnings

If any error bar is smaller than the symbol, Prism now places a floating note on the graph explaining why the error bars are not shown.

Prism will warn you if you mix SD and SEM error bars on the same graph, as this is usually not intentional.

New default

Prism 6 always defaulted to SD error bars. A new preference lets you choose whether you prefer to default to SD or SEM error bars.