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For more information, please see full course syllabus of Statistics
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Lecture Comments (1)

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Post by Beiquan Cao on April 24, 2010

20/1250=0.016, not 0.066

Large Sample Test for a Difference in Two Proportions

  • When testing the difference between two proportions, p1p2, a pooled estimate of the population proportion must be created.

  • The pooled proportion, p, is the total number of successes in the two samples divided by the total sample size between the two samples.

  • The test statistic is


Large Sample Test for a Difference in Two Proportions

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

  • Intro 0:00
  • Pooled Estimate of P1 and P2 0:09
  • Example 1: Softball Bases 1:34
  • Example 2: Sleep Problems 6:59
  • Extra Example 1
  • Extra Example 2