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ACT® · Math: Statistics and Probability — Describing Data

Center, Shape, and Spread of a Dataset

Watch it drawn4 questionsPractice

Watch it explained

  1. How it worksHow do center, shape and spread give you three separate facts about one pile of numbers?
  2. How it worksWalk me through reading a distribution's shape off a dot plot: symmetric, skewed left, or skewed right.
  3. Worked exampleFind the mean, median and range of the data set 4, 7, 7, 9, 12, 15, 34.
  4. Common mistakeWhy isn't a small range enough to say two data sets are spread out the same way?

Check yourself

Your turneasy1 of 3
Find the mean of the data set 4, 7, 7, 9, 12, 15, 34.

End of topic.

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