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Description
Add grouped error‑bar plot example to gallery
Add a demo script to galleries/examples/statistics/errorbar_features.py
showing how to plot mean ± standard error for multiple groups.
Reason
Error bars are important in data analysis to communicate uncertainty. A clear grouped example helps analysts present summary statistics effectively.
Proposed Plot
- Synthetic DataFrame with groups:
group
,measurement
. - Compute mean and SEM per group using Pandas.
- Plot with
plt.errorbar()
and labeled axes. - Add explanatory comments and optional
savefig
.
Benefits: Teaches group-aggregation and uncertainty visualization.