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AP Statistics 3.5 A Identify an Appropriate Testing Method for a Population Proportion Including the Parameter for the Population Questions

Practise defining a population proportion in context and selecting a one-sample z-test when one sample, rather than two independent groups, supplies the data.

Syllabus
Effective Fall 2026
Course
AP Statistics

Exam points

  • Define p as the true population proportion for the response and target population in context.
  • Select a one-sample z-test when one sample estimates or tests one population proportion.
  • Do not treat complementary categories from one sample as two independent proportions.

AP Statistics 3.5 A Identify an Appropriate Testing Method for a Population Proportion Including the Parameter for the Population Questions question 1

[Maximum number: 1]

Researchers want to study whether a capuchin monkey named Rafiki can correctly predict (better than guesswork) whether the Dow Jones Industrial Average (DJIA) will go up or down on any given day. In a random sample of 10 days, Rafiki correctly predicted the rise or fall of the DJIA on 7 of the 10 days. (He did this by choosing to eat a banana from either a box with an "up" arrow or a box with a "down" arrow.)

Identify the parameter of interest.

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