(0.05/ (o.35)3.43John flies frequențly and likes to upgrade his seat to first class. He has determined that if he checksin for his flight at least 2 hours early, the probability that he will get the upgrade is0.8)otherwise, theprobability that he will get the upgrade is 0.3)With his busy schedule, he checks in at least 2, hoursbefore his flight only 40% of the time. What is the probability that for a randomly selected trip Johnwill be able to upgrade to first class?37.3.44A diagnostic test for a certain disease has 95% sensitivity and 95% specificity. Only 1% of thepopulation has the disease in question. If the diagnostic test reports that a person chosen at randomfrom the population tests positive, what is the conditional probability that the person does, in fact,have the disease? Are you surprised by the size of the answer? Do you consider this diagnostic testreliable?3.45 Two methods, A and B, are available for teaching a certain industrial skill. The failure rate is 30%for method A and 10% for method B. Method B is more expensive, however, and hence is used only20% of the time. (Method A is used the other 80% of the time.) A worker is taught the skill by oneof the two methods, but he fails to learn it correctly. What is the probability that he was taught byusing method A?A mumps vaccine was licensed in the United States in 1967. The American Committee on Immu-zaion Practices recommended routine vaccination of children 12 months and older in 1977. Mostchildren receive an MMR11a) vaccination at 15 months. In recent years, there

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John flies frequently and likes to upgrade his seat to first class. He has determined that if he checks in for his flight at least 2 hours early, the probability that he will get the upgrade is0.8)otherwise, the probability that he will get the upgrade is 0.3)With his busy schedule, he checks in at least 2 hours before his flight only 40% of the time. What is the probability that for a randomly selected trip John will be able to upgrade to first class? 37.

John flies frequently and likes to upgrade his seat to first class. He has determined that if he checks in for his flight at least 2 hours early, the probability that he will get the upgrade is0.8)otherwise, the probability that he will get the upgrade is 0.3)With his busy schedule, he checks in at least 2 hours before his flight only 40% of the time. What is the probability that for a randomly selected trip John will be able to upgrade to first class? 37.

MATLAB: An Introduction with Applications

6th Edition

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Concept explainers

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

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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Question

(0.05/ (o.35)
3.43
John flies frequențly and likes to upgrade his seat to first class. He has determined that if he checks
in for his flight at least 2 hours early, the probability that he will get the upgrade is0.8)otherwise, the
probability that he will get the upgrade is 0.3)With his busy schedule, he checks in at least 2, hours
before his flight only 40% of the time. What is the probability that for a randomly selected trip John
will be able to upgrade to first class?
37.
3.44
A diagnostic test for a certain disease has 95% sensitivity and 95% specificity. Only 1% of the
population has the disease in question. If the diagnostic test reports that a person chosen at random
from the population tests positive, what is the conditional probability that the person does, in fact,
have the disease? Are you surprised by the size of the answer? Do you consider this diagnostic test
reliable?
3.45 Two methods, A and B, are available for teaching a certain industrial skill. The failure rate is 30%
for method A and 10% for method B. Method B is more expensive, however, and hence is used only
20% of the time. (Method A is used the other 80% of the time.) A worker is taught the skill by one
of the two methods, but he fails to learn it correctly. What is the probability that he was taught by
using method A?
A mumps vaccine was licensed in the United States in 1967. The American Committee on Immu-
zaion Practices recommended routine vaccination of children 12 months and older in 1977. Most
children receive an MMR
11a) vaccination at 15 months. In recent years, there

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