A true/false test has 40 questions. A passing grade is 60% or more correct answers. a. What
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A true/false test has 40 questions. A passing grade is 60% or more correct answers.
a. What is the probability that a person will guess correctly on one true/false question?
b. What is the probability that a person will guess incorrectly on one question?
c. Find the approximate probability that a person who is just guessing will pass the test.
d. If a similar test were given with multiple-choice questions with four choices for each question, would the approximate probability of passing the test by guessing be higher or lower than the approximate probability of passing the true/false test? Why?
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a 1 2 05 b 1 2 05 c Large Sample np 40 05 20 10 and n 1 p 40 ...View the full answer
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Related Book For 
Introductory Statistics Exploring The World Through Data
ISBN: 9780321978271
2nd Edition
Authors: Robert Gould, Colleen Ryan
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