توضیح 1
The box spans the middle 50 percent.
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درس 9 از 15
Build box plots, calculate fences, and compare center, spread, shape, and potential outliers.
Theory
Build box plots, calculate fences, and compare distribution center, spread, shape, and potential outliers. The examples in this lesson use fictional STATLAB Academy business data and independently written explanations.
توضیح 1
The box spans the middle 50 percent.
توضیح 2
Whiskers and outlier rules depend on the plot convention.
توضیح 3
Side-by-side boxes support group comparisons.
نمادگذاری و فرمولها
Lower = Q1 - 1.5(IQR); Upper = Q3 + 1.5(IQR)
Build box plots, calculate fences, and compare distribution center, spread, shape, and potential outliers.
فعالیت تعاملی
Median
19.0
IQR
6.5
Five-number range
12 to 31
فعالیت تعاملی
Fences: 5.5 to 23.5. Flagged: 38. Review context before any data change.
ارتباط با R
Run and edit the code, inspect printed output, and use the movable R Code Guide for line-by-line help.
Live R Lab
Compare R quantile definitions, calculate IQR fences, and build group box plots.
Ready to run
مثال حلشده
سناریو
A fictional training organization needs to use box plots, fences, and the five-number summary to support an operational decision.
The best summary is the one that fits the question, data structure, units, and distribution.
Interpretation safeguard
A box-plot marker is a potential outlier, not proof of an error.
Dataset provenance
Original synthetic data generated for STATLAB Academy. No textbook data used.
بازاندیشی
Name the question, data structure, units, chosen method, and one limitation.
دستیار
Coach me through Box Plots, Fences, and the Five-Number Summary without giving direct quiz answers or writing my final report. Ask me to justify assumptions, units, and interpretation.