General Skills

Measuring Spread with Range and IQR

You will measure how spread out a dataset is using two practical tools: the range and the interquartile range (IQR). Along the way, you will assemble five-number summaries, read box plots, flag outliers with the 1.5×IQR rule, and decide which spread measure tells the more honest story.

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5 lessons

18 practices

1 hour

Describing Data Statistically

Course details

Calculating the Range

Preview

Finding Range From Tables

Find Range From Dot Plots

Explain What Range Misses

Previous Course Next Course: Understanding Standard Deviation

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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

Measuring Spread with Range and IQR

Course details

Unit 13 practices13 min

Unit 24 practices16 min

Unit 33 practices13 min

Unit 44 practices16 min

Unit 54 practices16 min

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