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Name: April 5, 2001 Score:

MATH 147

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Quiz 9

(10 pts.)

Problem 1. 144 tickets are drawn with replacement from the box containing 36 5's and 64 -2's.

a. What is the smallest the sum of the 144 draws can be?

b. What is the largest the sum of the 144 draws can be?

c. What do you expect the sum of the 144 draws can be?

d. What is the standard error for this experiment?

e. Approximately what are the chances that the sum of the draws is negative?