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Computers & Digital Literacy · Grade 12

Analyze Data and Communicate Uncertainty

Learners find out why estimates from samples wobble, separate chance variation from bias, and use the approximation 'margin of error is about 1/√n' to turn a sample share into an honest interval. They compare groups with intervals and error bars, learn why 'no evidence of a difference' is not 'evidence of no difference', and rewrite headlines and charts so the precision of the words matches the precision of the data. A bike-share survey runs through the course, and a sampling simulation makes the variation visible.

  • 4 lessons
  • About 115 minutes
  • Uncertainty check: 10 questions
  • Ways to answer: fill in the blanks, choose an answer, trace code, highlight a text, match pairs and type a number
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What learners will discover

  • Explain why estimates from random samples vary, distinguish chance variation from bias, and relate sample size to precision.
  • Estimate the margin of error for a proportion with the approximation 1/√n (roughly 95% confidence), state what it assumes and leaves out, and report results as intervals.
  • Compare groups using intervals and error bars, distinguishing 'no evidence of a difference' from 'evidence of no difference'.
  • Communicate uncertainty honestly: round to the precision the data support, give counts, sample sizes and ranges, and choose verbs and chart designs that do not overclaim.

Lessons

  1. Variability: why estimates wobble 7 steps4 practiceabout 27 min
  2. Margin of error and intervals 7 steps5 practiceabout 30 min
  3. Comparing groups: error bars and overlap 6 steps4 practiceabout 28 min
  4. Honest numbers in headlines and charts 6 steps3 practiceabout 27 min
  5. Uncertainty check 10 questions at the end

Keep exploring

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Guide for grown-ups