37 - Comparing proportions

Is there a shift in men's risk taking behavior when women are present?

Homework: Chapter 22 # 9, 11, 23, Read page 523

Vocabulary: pooling, two-proportion z-test

Study Questions:

  1. When do we pool? what does pooling mean?
  2. Comment on the necessity of independence and randomization condition for hypothesis tests and confidence intervals for the difference in two proportions.
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