6.91 Multiple choice: Guess answers A question has four possible answers, only one of which is correct.
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6.91 Multiple choice: Guess answers A question has four possible answers, only one of which is correct. You randomly guess the correct response. With 20 such questions, the distribution of the number of incorrect answers
a. is binomial with n = 20 and p = 0.25.
b. is binomial with n = 20 and p = 0.50.
c. has mean equal to 10.
d. has probability 1.75220 that all 20 guesses are incorrect.
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Related Book For 
Statistics The Art And Science Of Learning From Data
ISBN: 9781292164878
4th Global Edition
Authors: Alan Agresti, Christine A. Franklin, Bernhard Klingenberg
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