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Algebra 1 · Chapter 12 · Lesson 12.4 · Printable PDF

Variance of a Data Set Worksheet with Answer Key

6 problems on variance of a data set: which lists measure spread, go-kart lap times, consecutive even numbers, minimizing squared distance, trout lengths, and egg weights where rounding the mean changes the answer. 2 pages, with a worked answer key.

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What's on the worksheet

  1. Choose which of the coach's four lists are numerical data and compare their spread.
  2. Hannah's go-kart laps: find the mean lap time and the variance.
  3. Show the variance of four consecutive even numbers does not depend on n.
  4. Find the number c that makes the sum of squared distances to the data smallest.
  5. Complete the trout table of deviations and squares and find the variance.
  6. Eggs: see how rounding the mean to a whole number changes the table.

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The free lesson teaches it with worked examples and practice problems.

Variance of a data set: the lesson ›

More Chapter 12 worksheets: One-variable statistics