"I tell them that if they will occupy themselves with the study of mathematics they will find in it the best remedy against the lusts of the flesh." - (Thomas Mann, 1875-1955, The Magic Mountain) George Boole (1815-1864): While a professor of mathematics in Ireland, Englishman Boole began to concentrate on the logic used in the construction of algebraic systems. In his book, Investigation of the Laws of Thought (1854), Boole established the foundations for modern symbolic logic, and in the process he created a new algebra, which we now call Boolean algebra. One of the true mathematical innovators of his century, Boole's ideas are applied in this modern day in circuit design, probability, insurance, and information theory. Why did Herkimer ask a pretty girl to go with him to a barbecue? Answer: He wanted her to be his grill friend. Herky's friends: LIZ ONYA: She really loves Italian food. ARTHUR ITIS: This guy always complains about soreness in his knees. ASSIGNMENT #83 Reading: SUMMARY (pages 715-716), Section 13.2 (pages 717-721) Exercises: 13.12 (page 716), 13.13, 13.14 (page 722)

You are working in Sections 13.1 and13.2.

Key thoughts:

• The chi-square test for a two-way table test the null hypothesis that there is no relationship between the row and column variables.
• With r rows and c columns, there are (r-1)(c-1) degrees of freedom.
• The chi-square distribution represents an approximation that can be used when
all expected counts are at least 1, and

no more than 20% are less than 5.

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Text:
The Practice of Statistics, by Yates, Moore, McCabe. New York,W.H. Freeman and Company, 1999. (;l 0-7167-3370-6)

Supplemental books:
The Cartoon Guide to Statistics, by Gonick and Smith. NewYork, HarperCollins Publishers, 1993. (ISBN 0-06-273102-5)
How to Lie with Statistics, by Darrell Huff. New York, W.W.Norton & Company, 1982 (ISBN 0-393-09426-X)