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Lesson 9 of 20 · about 15 min

Variance and standard deviation

Two pizza places both deliver in 30 minutes on average, but one is always within 2 minutes and the other can take 50. The average hides the difference; variance measures it. You'll stretch and squeeze a distribution on the seesaw, compute spread by hand and in code, and see why rolling two dice is safer than doubling one.

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This lesson is part of the DoingCamp Pass. Members get every lesson in every course, with all the interactive visuals, coding exercises and challenges.

In this lesson you'll learn:

  • Variance
  • Standard deviation (SD)

Free to try in F07 Probability & Statistics:

The first 3 lessons of every course are free, no account needed.