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Statistics · Chapter 7 · Lesson 7.3 · Printable PDF

Confidence Level and Interpreting an Interval Worksheet with Answer Key

6 problems on confidence level and interpreting an interval. 3 pages, with a worked answer key.

6 problems3 pagesanswer key
Printable Confidence level and interpreting an interval worksheet with answer key - Statistics (Page 1 PDF preview)
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Try one first: a free Chapter 1 worksheet (PDF, no sign-in).

The full Statistics courseEvery lesson in teaching order, with over 390 printables.See the course ›

What's on the worksheet

  1. A seed company tests each lot by planting a random sample of 200 seeds and computing p ± 2\,SE for the share that germinate.
  2. A water-safety group asks a random sample of 500 adults in a large country whether they can swim 50 meters without stopping, and 180 say yes…
  3. A forest service inspects a random sample of 600 of the 9,000 beech trees in a state forest, and 210 show beech bark disease.
  4. A city's TV station invites viewers to text YES or NO:
  5. A town surveys a random sample of 900 of its registered voters, and 468 favor a ban on gas-powered leaf blowers.
  6. A repair center takes a random sample of 300 laptops from a store chain's large stock of returned laptops, and 54 have a cracked hinge.

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

Confidence level and interpreting an interval: the lesson ›

More Chapter 7 worksheets: Inference for proportions: confidence intervals