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Boxplot what do the dots represent? [duplicate]

I am learning datascience for data analysis I am using seaborn and doing a box plot which resulted in below plot

enter image description here

I understood the whiskers which represting quantiles and the dots on top at 45 and 52 are max values. what I don't understand is what do the dots in between represent and what are they called

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Haricharan Reddy Avatar asked Apr 15 '26 00:04

Haricharan Reddy


1 Answers

In box plots, dots are outliers. This is not particular to Seaborn or any other tool; it is generical to visualization in statistics.

The outliers are points that stay out of the interval [Q1-1.5*IQR; Q3+1.5*IQR], with:

  • Q1 = Quartile 1 (25th percentile)
  • Q3 = Quartile 3 (75th percentile)
  • IQR = Interquartile range from Q1 to Q3

I think you will understand that better if you plot the histograms matching those box plots :)

Please, read this post, it is quite good :)

like image 178
nunohpinheiro Avatar answered Apr 16 '26 13:04

nunohpinheiro



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