SIMPSON

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SIMPSONS PARADOX How does it happen?
Pamela Leutwyler
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A perfume company is testing two new
scents Citrus And Orange blossom
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28 single women volunteer to test these products
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15 are Eagles cheerleaders
13 are members of Grannys bingo club
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13 women choose CITRUS
15 women choose ORANGE
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80 success rate
70 success rate
4 OF THE 5 CHEERLEADERS WHO USED CITRUS FOUND
LOVE!
7 OF THE 10 CHEERLEADERS WHO USED ORANGE
FOUND LOVE!
CITRUS appears to be more effective for
cheerleaders
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2 OF THE 8 GRANNIES WHO USED CITRUS FOUND
LOVE!


1 OF THE 5 GRANNIES WHO USED ORANGE FOUND
LOVE!
80 success rate
70 success rate
CITRUS appears to be more effective for grannies
20 success rate
25 success rate
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CITRUS is better for cheerleaders
80 success rate
70 success rate
CITRUS is better for grannies
20 success rate
25 success rate
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6 of the 13 women who used Citrus found love. 46
8 of the 15 women who used Orange found love.
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Overall Orange has a higher success rate
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How can it happen that CITRUS works better for
cheerleaders and CITRUS works better for
grannies While ORANGE works better overall???
Where are most of the cheerleaders?
Where are most of the grannies?
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