u are taking a multiple choice test for which you have mastered 70% of the material. sume this means that you have a 0.7 chance of knowing the answer to a random test stion, and that if you don't know the answer to a question then you randomly select ong the four answer choices. Finally, assume that this holds for each qurstion, ependent of the others. Let p be the probability of getting a random question correct. If the test has 20 questions, what is the probability that the corrected questions are e than two standard deviations away from the mean value? Compute it using the le. f the test has 10 questions, what is the probability you score 90% or higher? Write n your answer using the binomial pmf directly. Don't use the Table. Ewe randomly select 50 questions, compute the probability that your score is 909 her using the approximation to a normal distributiion.
u are taking a multiple choice test for which you have mastered 70% of the material. sume this means that you have a 0.7 chance of knowing the answer to a random test stion, and that if you don't know the answer to a question then you randomly select ong the four answer choices. Finally, assume that this holds for each qurstion, ependent of the others. Let p be the probability of getting a random question correct. If the test has 20 questions, what is the probability that the corrected questions are e than two standard deviations away from the mean value? Compute it using the le. f the test has 10 questions, what is the probability you score 90% or higher? Write n your answer using the binomial pmf directly. Don't use the Table. Ewe randomly select 50 questions, compute the probability that your score is 909 her using the approximation to a normal distributiion.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Contingency Table
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Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
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Transcribed Image Text:u are taking a multiple choice test for which you have mastered 70% of the material.
sume this means that you have a 0.7 chance of knowing the answer to a random test
stion, and that if you don't know the answer to a question then you randomly select
ong the four answer choices. Finally, assume that this holds for each qurstion,
ependent of the others. Let p be the probability of getting a random question correct.
If the test has 20 questions, what is the probability that the corrected questions are
e than two standard deviations away from the mean value? Compute it using the
le.
f the test has 10 questions, what is the probability you score 90% or higher? Write
n your answer using the binomial pmf directly. Don't use the Table.
Ewe randomly select 50 questions, compute the probability that your score is 909
her using the approximation to a normal distributiion.
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