beginner

Introduction to Distributions

Explore how data behaves from start to finish. You'll learn to describe distributions, calculate measures of center and spread, and interpret histograms and box plots — building the skills to spot patterns, identify outliers, and draw meaningful conclusions from real-world data.

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Verified skills you'll gain

INTERMEDIATE

Describing Data Statistically

INTERMEDIATE

Describing Distributions

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Course 2

Measuring Spread and Variability

4 lessons

15 practices

You'll learn what variability means and how to measure it using range and interquartile range. By comparing these two measures, you'll understand what each one reveals about how consistently data values cluster together and when each is most informative.

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Course 3

Analyzing Data with Histograms

4 lessons

14 practices

You'll learn to read histograms by interpreting axes, bins, and bar heights. Then you'll classify distribution shapes, spot clusters and gaps, and draw practical conclusions from the data on display.

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Course 4

Analyzing Data with Box Plots

4 lessons

16 practices

You'll learn to read and interpret box plots by identifying the five-number summary and understanding what each component reveals. You'll also detect outliers using the 1.5 × IQR rule and compare distributions across groups with side-by-side box plots.

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Francisco Aguilar Meléndez

Data Scientist

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From our community

Hear what our customers have to say about CodeSignal Learn

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

I love that it's personalized. When I'm stuck, I don't have to hope my Google searches come out successful. The AI mentor Cosmo knows exactly what I need.

Faith Yim

Software Engineer

+14

It's an amazing product and exceeded my expectations, helping me prepare for my job interviews. Hands-on learning requires you to actually know what you are doing.

Alex Bush

Full Stack Engineer

I'm really impressed by the AI tutor Cosmo's feedback about my code. It's honestly kind of insane to me that it's so targeted and specific.

Abbey Helterbran

Tech consultant

I tried Leetcode but it was too disorganized. CodeSignal covers all the topics I'm interested in and is way more structured.

Jonathan Miller

Senior Machine Learning Engineer

+12

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11