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SD, SEM, and 95% CI are three different error bars answering three different questions, and they're not interchangeable. The standard error vs standard deviation confusion is where most figures go wrong: SEM is always the smallest, so it makes data look tighter than it is, which is why reviewers flag it most. This piece explains what each bar actually claims, shows one dataset drawn three ways, and tells you which to use, and when to just report SD with your n.

Are you ready to transform your raw data into publication-quality visualizations? Our beginner's guide to GraphPad Prism demystifies the process. We walk you through the first essential steps, from choosing the right graph and entering your data to customizing your visuals and performing basic statistical analysis. Stop wrestling with complicated software and start creating beautiful, informative graphs in minutes.