Understanding Statistical Variability


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question 1 of 3

What is statistical variance?

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1. We expect what percentage of data points to fall within 1 standard deviation on a normal distribution?

2. What are the three most common measures of data dispersion?

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About This Quiz & Worksheet

Students can use these assessments to check their understanding of statistical variability. They will ask questions about the definition of variance and what it measures.

Quiz & Worksheet Goals

The quiz/worksheet will ask students questions on the following topics:

  • The definition of variance
  • Standard deviation
  • The common measures of data dispersion
  • What standard deviation and variance measure
  • Mean, median, and mode

Skills Practiced

The assessments will allow students the opportunity to improve these skills:

  • Reading comprehension - read and pull the most important information from the related lesson on statistical variability
  • Defining key concepts - accurately define terms and ideas such as variance and standard deviation
  • Information recall - access the knowledge you've gained regarding mean, median, and mode
  • Knowledge application - use your knowledge to answer questions about the three measures common to data dispersion

Additional Learning

For more information on this topic, take a look at the accompanying lesson, Understanding Statistical Variability. It will help students meet these educational objectives:

  • Define mean, median, and mode
  • Understand range
  • Describe variance
  • Learn about standard deviation