For Exercises 7 through 16, assume all variables are bino-mial. (Note: If values are not found in Table B of AppendixA, use the binomial formula.)7. Belief in UFOS A survey found that 10% of Americansbelieve that they have seen a UFO. For a sample of 10people, find each probability:a. That at least 2 people believe that they have seen aUFOb. That 2 or 3 people believe that they have seen aUFOc. That exactly 1 person believes that he or she has seena UFO8. Multiple-Choice Exam A student takes a 20-question,multiple-choice exam with five choices for each ques-tion and guesses on each question. Find the probabilityof guessing at least 15 out of 20 correctly. Would youconsider this event likely or unlikely to occur? Explainyour answer.9. High Blood Pressure Twenty percent of Americansages 25 to 74 have high blood pressure. If 16 randomlyselected Americans ages 25 to 74 are selected, find eachprobability.a. None will have high blood pressure.b. One-half will have high blood pressure.c. Exactly 4 will have high blood pressure.Source: www.factfinder.census.gov10. High School Dropouts Approximately 10.3% ofAmerican high school students drop out of school

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7. Belief in UFOS A survey found that 10% of Americans believe that they have seen a UFO. For a sample of 10 people, find each probability: a. That at least 2 people believe that they have seen a UFO b. That 2 or 3 people believe that they have seen a UFO c. That exactly 1 person believes that he or she has seen a UFO

7. Belief in UFOS A survey found that 10% of Americans believe that they have seen a UFO. For a sample of 10 people, find each probability: a. That at least 2 people believe that they have seen a UFO b. That 2 or 3 people believe that they have seen a UFO c. That exactly 1 person believes that he or she has seen a UFO

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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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.

Topic Video

Question

For Exercises 7 through 16, assume all variables are bino-
mial. (Note: If values are not found in Table B of Appendix
A, use the binomial formula.)
7. Belief in UFOS A survey found that 10% of Americans
believe that they have seen a UFO. For a sample of 10
people, find each probability:
a. That at least 2 people believe that they have seen a
UFO
b. That 2 or 3 people believe that they have seen a
UFO
c. That exactly 1 person believes that he or she has seen
a UFO
8. Multiple-Choice Exam A student takes a 20-question,
multiple-choice exam with five choices for each ques-
tion and guesses on each question. Find the probability
of guessing at least 15 out of 20 correctly. Would you
consider this event likely or unlikely to occur? Explain
your answer.
9. High Blood Pressure Twenty percent of Americans
ages 25 to 74 have high blood pressure. If 16 randomly
selected Americans ages 25 to 74 are selected, find each
probability.
a. None will have high blood pressure.
b. One-half will have high blood pressure.
c. Exactly 4 will have high blood pressure.
Source: www.factfinder.census.gov
10. High School Dropouts Approximately 10.3% of
American high school students drop out of school

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