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Simpson’s Paradox. CH. 3 Day 4 AP Statistics EQ : What is Simpson’s Paradox ?. What is Simpson’s Paradox?. A reversal of a decision based on finding different averages. Be careful when you average across different levels of a second variable. Unfair or silly averaging is used.

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simpson s paradox

Simpson’s Paradox

CH. 3 Day 4

AP Statistics

EQ:What is

Simpson’s

Paradox?

what is simpson s paradox
What is Simpson’s Paradox?
  • A reversal of a decision based on finding different averages.
  • Be careful when you average across different levels of a second variable.
  • Unfair or silly averaging is used
slide3

Suppose there are two pilots, Moe and Jill. Moe argues that he’s the better pilot since he managed to land 83% of his last 120 flights on time compared with Jill’s 78%.

slide7

Ex.

For a 1973 study on sex bias in admissions to the graduate school at the University of California, Berkeley, the table shows the information obtained for the five largest majors on that campus.

slide8

Ex.

  • 1. Out of the total male applicants, what is the probability of males admitted?
  • 2. Out of the total female applicants, what is the probability of females admitted?
  • 3. Who is getting admitted more often?
slide10

Ex.

  • 4. For each major, find the percentage of males admitted.
  • 5. For each major, find the percentage of females admitted.
  • 6. Is there discrimination going on at the University of California, Berkeley in the graduate school? Why or Why not?
homework
Homework

P. 43 # 37, Worksheet