THINKING MATHEMATICALLY
7th Edition
ISBN: 9780135961841
Author: Blitzer
Publisher: PEARSON
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Textbook Question
Chapter 4.2, Problem 73E
Make Sense? In Exercises 73-76, determine whether each statement makes sense or does not make sense, and explain your reasoning.
Base b contains b – 1 digit symbols.
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Suppose the number of people who register to attend the Tucson Festival of Books can be modeled by P(t) = k(1.1),
where t is the number of days since the registration window opened. Assume k is a positive constant.
Which of the following represents how long it will take in days for the number of people who register to double?
t =
In(1.1)
In(2)
In(2)
t =
In(1.1)
In(1.1)
t =
t =
t =
In(2) - In(k)
In(2)
In(k) + In(1.1)
In(2) - In(k)
In(1.1)
For unemployed persons in the United States, the average number of months of unemployment at the end of December 2009 was approximately seven months (Bureau of Labor Statistics, January 2010). Suppose the following data are for a particular region in upstate New York. The values in the first column show the number of
months unemployed and the values in the second column show the corresponding number of unemployed persons.
Months
Unemployed
Number
Unemployed
1
1029
2
1686
3
2269
4
2675
5
3487
6
4652
7
4145
8
3587
9
2325
10
1120
Let x be a random variable indicating the number of months a person is unemployed.
a. Use the data to develop an empirical discrete probability distribution for x (to 4 decimals).
(x)
f(x)
1
2
3
4
5
6
7
8
9
10
b. Show that your probability distribution satisfies the conditions for a valid discrete probability distribution.
The input in the box below will not be graded, but may be reviewed and considered by your instructor.
blank
c. What is the probability that a…
West Virginia has one of the highest divorce rates in the nation, with an annual rate of approximately 5 divorces per 1000 people (Centers for Disease Control and Prevention website, January 12, 2012). The Marital Counseling Center, Inc. (MCC) thinks that the high divorce rate in the state may require them to hire additional staff.
Working with a consultant, the management of MCC has developed the following probability distribution for x = the number of new clients for marriage counseling for the next year.
Excel File: data05-19.xls
x
10
f(x)
.05
20
30
.10
.10
40
.20
50
60
.35
.20
a. Is this probability distribution valid?
- Select your answer-
Explain.
f(x)
Σf(x)
Select your answer
Select your answer
b. What is the probability MCC will obtain more than 30 new clients (to 2 decimals)?
c. What is the probability MCC will obtain fewer than 20 new clients (to 2 decimals)?
d. Compute the expected value and variance of x.
Expected value
Variance
clients per year
squared clients per year
Chapter 4 Solutions
THINKING MATHEMATICALLY
Ch. 4.1 - CHECK POINT 1 Write each of the following in...Ch. 4.1 - CHECK POINT 2 Express each expanded form as a...Ch. 4.1 - CHECK POINT 3 Write each Babylonian numeral as a...Ch. 4.1 - CHECK POINT 4 Write each Mayan numeral as a...Ch. 4.1 - Q.1. A number addresses the question “how many?” A...Ch. 4.1 - Q.2. Our number system is called the __________...Ch. 4.1 - Prob. 3CVCCh. 4.1 - Q.4. When we write 547 as, , we are using an...Ch. 4.1 - Prob. 5CVCCh. 4.1 - The Hindu Arabic numeration system uses power of...
Ch. 4.1 - Prob. 7CVCCh. 4.1 - Using ∨ for 1 and < for 10, the expanded from < ...Ch. 4.1 - Q.9. The place value in the Mayan numeration...Ch. 4.1 - Q.10.
= = .
...Ch. 4.1 - In Exercises 1-8, evaluate the expression.
1.
Ch. 4.1 - In Exercises 1-8, evaluate the expression.
2.
Ch. 4.1 - Prob. 3ECh. 4.1 - Prob. 4ECh. 4.1 - In Exercises 1-8, evaluate the expression. 3 4Ch. 4.1 - Prob. 6ECh. 4.1 - Prob. 7ECh. 4.1 - Prob. 8ECh. 4.1 - Prob. 9ECh. 4.1 - Prob. 10ECh. 4.1 - Prob. 11ECh. 4.1 - In Exercises 9-22, write each Hindu-Arabic numeral...Ch. 4.1 - In Exercises 9-22, write each Hindu-Arabic numeral...Ch. 4.1 - In Exercises 9-22, write each Hindu-Arabic numeral...Ch. 4.1 - Prob. 15ECh. 4.1 - Prob. 16ECh. 4.1 - In Exercises 9-22, write each Hindu-Arabic numeral...Ch. 4.1 - Prob. 18ECh. 4.1 - Prob. 19ECh. 4.1 - Prob. 20ECh. 4.1 - In Exercises 9-22, write each Hindu-Arabic numeral...Ch. 4.1 - In Exercises 9-22, write each Hindu-Arabic numeral...Ch. 4.1 - Prob. 23ECh. 4.1 - Prob. 24ECh. 4.1 - Prob. 25ECh. 4.1 - Prob. 26ECh. 4.1 - Prob. 27ECh. 4.1 - Prob. 28ECh. 4.1 - In Exercises 23-32, express each expanded form as...Ch. 4.1 - Prob. 30ECh. 4.1 - Prob. 31ECh. 4.1 - Prob. 32ECh. 4.1 - Prob. 33ECh. 4.1 - Prob. 34ECh. 4.1 - Prob. 35ECh. 4.1 - In Exercises 34-46, use Table 4.1 on page 215 to...Ch. 4.1 - In Exercises 34-46, use Table 4.1 on page 215 to...Ch. 4.1 - Prob. 38ECh. 4.1 - Prob. 39ECh. 4.1 - Prob. 40ECh. 4.1 - Prob. 41ECh. 4.1 - Prob. 42ECh. 4.1 - Prob. 43ECh. 4.1 - Prob. 44ECh. 4.1 - In Exercises 34-46, use Table 4.1 on page 215 to...Ch. 4.1 - Prob. 46ECh. 4.1 - In Exercises 47-60, use Table 4.2 on page 216 to...Ch. 4.1 - In Exercises 47-60, use Table 4.2 on page 216 to...Ch. 4.1 - Prob. 49ECh. 4.1 - Prob. 50ECh. 4.1 - Prob. 51ECh. 4.1 - In Exercises 47-60, use Table 4.2 on page 216 to...Ch. 4.1 - In Exercises 47-60, use Table 4.2 on page 216 to...Ch. 4.1 - In Exercises 47-60, use Table 4.2 on page 216 to...Ch. 4.1 - Prob. 55ECh. 4.1 - Prob. 56ECh. 4.1 - Prob. 57ECh. 4.1 - Prob. 58ECh. 4.1 - Prob. 59ECh. 4.1 - Prob. 60ECh. 4.1 - Prob. 61ECh. 4.1 - Prob. 62ECh. 4.1 - Prob. 63ECh. 4.1 - Prob. 64ECh. 4.1 - Prob. 65ECh. 4.1 - Prob. 66ECh. 4.1 - Prob. 67ECh. 4.1 - Prob. 68ECh. 4.1 - Prob. 69ECh. 4.1 - Prob. 70ECh. 4.1 - Prob. 71ECh. 4.1 - Prob. 72ECh. 4.1 - Prob. 73ECh. 4.1 - Prob. 74ECh. 4.1 - Prob. 75ECh. 4.1 - Prob. 76ECh. 4.1 - Prob. 77ECh. 4.1 - Prob. 78ECh. 4.1 - Prob. 79ECh. 4.1 - Prob. 80ECh. 4.1 - Prob. 81ECh. 4.1 - Explain how to write a Hindu-Arabic numeral in...Ch. 4.1 - 83. Describe one way that the Babylonian system is...Ch. 4.1 - 84. Describe one way that the Mayan system is...Ch. 4.1 - Research activity Write a report on the history of...Ch. 4.1 - Prob. 86ECh. 4.1 - Prob. 87ECh. 4.1 - Prob. 88ECh. 4.1 - Make Sense? In Exercises 86-89, determine whether...Ch. 4.1 - Prob. 90ECh. 4.1 - Prob. 91ECh. 4.1 - Use Babylonian numerals to write the numeral that...Ch. 4.2 - CHECK POINT 1 Convert to base ten.
Ch. 4.2 - CHECK POINT 2 Convert to base ten.
Ch. 4.2 - CHECK POINT 3 Convert to base ten.
Ch. 4.2 - CHECK POINT 4 Convert the base ten numeral 6 to a...Ch. 4.2 - CHECK POINT 5 Convert the base ten numeral 365 to...Ch. 4.2 - CHECK POINT 6 Convert the base ten numeral 51 to a...Ch. 4.2 - CHECK POINT 7 Convert the base ten numeral 2763 to...Ch. 4.2 - In the numeral 324 five , the base is _____. In...Ch. 4.2 - 324 five = ( 3 × _ _ ) + ( 2 × _ _ ) + ( 4 × _ _ )Ch. 4.2 - Prob. 3CVCCh. 4.2 - Prob. 4CVCCh. 4.2 - Prob. 5CVCCh. 4.2 - Fill in each blank so that the resulting statement...Ch. 4.2 - Prob. 7CVCCh. 4.2 - Prob. 1ECh. 4.2 - Prob. 2ECh. 4.2 - In Exercises 1-18, convert the numeral to a...Ch. 4.2 - Prob. 4ECh. 4.2 - Prob. 5ECh. 4.2 - Prob. 6ECh. 4.2 - Prob. 7ECh. 4.2 - Prob. 8ECh. 4.2 - Prob. 9ECh. 4.2 - Prob. 10ECh. 4.2 - Prob. 11ECh. 4.2 - Prob. 12ECh. 4.2 - Prob. 13ECh. 4.2 - Prob. 14ECh. 4.2 - Prob. 15ECh. 4.2 - Prob. 16ECh. 4.2 - Prob. 17ECh. 4.2 - Prob. 18ECh. 4.2 - Prob. 19ECh. 4.2 - Prob. 20ECh. 4.2 - Prob. 21ECh. 4.2 - Prob. 22ECh. 4.2 - Prob. 23ECh. 4.2 - Prob. 24ECh. 4.2 - Prob. 25ECh. 4.2 - In Exercises 19-32, mentally convert each base ten...Ch. 4.2 - Prob. 27ECh. 4.2 - Prob. 28ECh. 4.2 - Prob. 29ECh. 4.2 - Prob. 30ECh. 4.2 - Prob. 31ECh. 4.2 - Prob. 32ECh. 4.2 - Prob. 33ECh. 4.2 - Prob. 34ECh. 4.2 - Prob. 35ECh. 4.2 - Prob. 36ECh. 4.2 - Prob. 37ECh. 4.2 - Prob. 38ECh. 4.2 - Prob. 39ECh. 4.2 - Prob. 40ECh. 4.2 - Prob. 41ECh. 4.2 - Prob. 42ECh. 4.2 - Prob. 43ECh. 4.2 - Prob. 44ECh. 4.2 - In Exercises 33-48, convert each base ten numeral...Ch. 4.2 - Prob. 46ECh. 4.2 - Prob. 47ECh. 4.2 - Prob. 48ECh. 4.2 - Prob. 49ECh. 4.2 - Prob. 50ECh. 4.2 - In Exercises 49-52, use Table 4.1 on page 215 to...Ch. 4.2 - Prob. 52ECh. 4.2 - Prob. 53ECh. 4.2 - In Exercises 53-56, use Table 4.2 on page 216 to...Ch. 4.2 - Prob. 55ECh. 4.2 - Prob. 56ECh. 4.2 - Prob. 57ECh. 4.2 - Prob. 58ECh. 4.2 - 59. Convert to base eight.
Ch. 4.2 - Prob. 60ECh. 4.2 - Prob. 61ECh. 4.2 - Prob. 62ECh. 4.2 - Prob. 63ECh. 4.2 - Prob. 64ECh. 4.2 - Read the Blitzer Bonus on page 222. Then use the...Ch. 4.2 - Prob. 66ECh. 4.2 - Prob. 67ECh. 4.2 - Prob. 68ECh. 4.2 - Prob. 69ECh. 4.2 - Prob. 70ECh. 4.2 - Prob. 71ECh. 4.2 - Prob. 72ECh. 4.2 - Make Sense? In Exercises 73-76, determine whether...Ch. 4.2 - Prob. 74ECh. 4.2 - Prob. 75ECh. 4.2 - Prob. 76ECh. 4.2 - In Exercises 77-78, write, in the indicated base,...Ch. 4.2 - Prob. 78ECh. 4.2 - Prob. 79ECh. 4.2 - Prob. 80ECh. 4.2 - Prob. 81ECh. 4.2 - Prob. 82ECh. 4.2 - The following topics are appropriate for either...Ch. 4.2 - The following topics are appropriate for either...Ch. 4.3 - CHECK POINT 1 Add: 32 five + 44 five . _Ch. 4.3 - Prob. 2CPCh. 4.3 - Prob. 3CPCh. 4.3 - Prob. 4CPCh. 4.3 - Prob. 5CPCh. 4.3 - Prob. 6CPCh. 4.3 - Prob. 1CVCCh. 4.3 - Prob. 2CVCCh. 4.3 - Consider the following addition in base eight: ...Ch. 4.3 - Prob. 4CVCCh. 4.3 - Prob. 5CVCCh. 4.3 - 6. We can use products in base three to perform...Ch. 4.3 - 7. True or False: Computation in bases other than...Ch. 4.3 - Prob. 1ECh. 4.3 - Prob. 2ECh. 4.3 - Prob. 3ECh. 4.3 - Prob. 4ECh. 4.3 - 342 five + 413 five _Ch. 4.3 - Prob. 6ECh. 4.3 - In Exercises 1-12, add in the indicated base. 645...Ch. 4.3 - In Exercises 1-12, add in the indicated base. 632...Ch. 4.3 - In Exercises 1-12, add in the indicated base. 6784...Ch. 4.3 - In Exercises 1-12, add in the indicated base.
10....Ch. 4.3 - In Exercises 1-12, add in the indicated base....Ch. 4.3 - In Exercises 1-12, add in the indicated base. 53 B...Ch. 4.3 - Prob. 13ECh. 4.3 - Prob. 14ECh. 4.3 - Prob. 15ECh. 4.3 - Prob. 16ECh. 4.3 - 475 eight − 267 eight _ _ _ _ _ _ _ _ _ _ _ _ _ _...Ch. 4.3 - In Exercises 13-24, subtract in the indicated...Ch. 4.3 - Prob. 19ECh. 4.3 - Prob. 20ECh. 4.3 - Prob. 21ECh. 4.3 - Prob. 22ECh. 4.3 - Prob. 23ECh. 4.3 - Prob. 24ECh. 4.3 - In Exercises 25-34, multiply in the indicated...Ch. 4.3 - Prob. 26ECh. 4.3 - Prob. 27ECh. 4.3 - Prob. 28ECh. 4.3 - In Exercises 25-34, multiply in the indicated...Ch. 4.3 - Prob. 30ECh. 4.3 - In Exercises 25-34, multiply in the indicated...Ch. 4.3 - In Exercises 25-34, multiply in the indicated...Ch. 4.3 - In Exercises 25-34, multiply in the indicated...Ch. 4.3 - Prob. 34ECh. 4.3 - Prob. 35ECh. 4.3 - In Exercises 35-38, use the multiplication tables...Ch. 4.3 - In Exercises 35-38, use the multiplication tables...Ch. 4.3 - Prob. 38ECh. 4.3 - Prob. 39ECh. 4.3 - In Exercises 39-46, perform the indicated...Ch. 4.3 - Prob. 41ECh. 4.3 - Prob. 42ECh. 4.3 - Prob. 43ECh. 4.3 - Prob. 44ECh. 4.3 - Prob. 45ECh. 4.3 - Prob. 46ECh. 4.3 - Read the Blitzer Bonus on page 233. Then use the...Ch. 4.3 - Prob. 48ECh. 4.3 - Prob. 49ECh. 4.3 - Prob. 50ECh. 4.3 - Prob. 51ECh. 4.3 - Prob. 52ECh. 4.3 - Prob. 53ECh. 4.3 - Prob. 54ECh. 4.3 - Prob. 55ECh. 4.3 - 56. Describe two difficulties that youngsters...Ch. 4.3 - Make Sense? In Exercises 57-60, determine whether...Ch. 4.3 - Make Sense? In Exercises 57-60, determine whether...Ch. 4.3 - Make Sense? In Exercises 57-60, determine whether...Ch. 4.3 - Make Sense? In Exercises 57-60, determine whether...Ch. 4.3 - Prob. 61ECh. 4.3 - Prob. 62ECh. 4.3 - Divide: 31 seven 2426 seven .Ch. 4.3 - 64. Use the Mayan numerals in Table 4.2 on page...Ch. 4.3 - Group members should research various methods that...Ch. 4.3 - 66. Organize a debate. One side represents people...Ch. 4.4 - CHECK POINT 1 Write the following numeral as a...Ch. 4.4 - CHECK POINT 2 Write 2563 as an Egyptian numeral.
Ch. 4.4 - Prob. 3CPCh. 4.4 - CHECK POINT 4 Write MCDXLVII as a Hindu-Arabic...Ch. 4.4 - Prob. 5CPCh. 4.4 - Prob. 6CPCh. 4.4 - Prob. 7CPCh. 4.4 - Prob. 1CVCCh. 4.4 - Prob. 2CVCCh. 4.4 - True or False: Like the system in Exercises 1-2,...Ch. 4.4 - Exercises 4-7 involve Roman numerals. Roman...Ch. 4.4 - Prob. 5CVCCh. 4.4 - Prob. 6CVCCh. 4.4 - Exercises 4-7 involve Roman numerals. Roman...Ch. 4.4 - Prob. 8CVCCh. 4.4 - Prob. 9CVCCh. 4.4 - Prob. 10CVCCh. 4.4 - Prob. 11CVCCh. 4.4 - Fill in the blank so that the resulting statement...Ch. 4.4 - Use Table 4.6 on page 236 to solve Exercises 1-12....Ch. 4.4 - Prob. 2ECh. 4.4 - Prob. 3ECh. 4.4 - Prob. 4ECh. 4.4 - Prob. 5ECh. 4.4 - Prob. 6ECh. 4.4 - Prob. 7ECh. 4.4 - Prob. 8ECh. 4.4 - Prob. 9ECh. 4.4 - Prob. 10ECh. 4.4 - Prob. 11ECh. 4.4 - Prob. 12ECh. 4.4 - Prob. 13ECh. 4.4 - Prob. 14ECh. 4.4 - Prob. 15ECh. 4.4 - Prob. 16ECh. 4.4 - Prob. 17ECh. 4.4 - Prob. 18ECh. 4.4 - Prob. 19ECh. 4.4 - Prob. 20ECh. 4.4 - Prob. 21ECh. 4.4 - Prob. 22ECh. 4.4 - Prob. 23ECh. 4.4 - Prob. 24ECh. 4.4 - Prob. 25ECh. 4.4 - In Exercises 13-28, write each Roman numeral as a...Ch. 4.4 - Prob. 27ECh. 4.4 - Prob. 28ECh. 4.4 - Prob. 29ECh. 4.4 - Prob. 30ECh. 4.4 - Prob. 31ECh. 4.4 - Prob. 32ECh. 4.4 - Prob. 33ECh. 4.4 - In Exercise 29-36, write each Hindu-Arabic numeral...Ch. 4.4 - Prob. 35ECh. 4.4 - Prob. 36ECh. 4.4 - Prob. 37ECh. 4.4 - Prob. 38ECh. 4.4 - Prob. 39ECh. 4.4 - Prob. 40ECh. 4.4 - Prob. 41ECh. 4.4 - Prob. 42ECh. 4.4 - Prob. 43ECh. 4.4 - Prob. 44ECh. 4.4 - Prob. 45ECh. 4.4 - In Exercises 43-48, write each Hindu-Arabic...Ch. 4.4 - Prob. 47ECh. 4.4 - Prob. 48ECh. 4.4 - Prob. 49ECh. 4.4 - In Exercises 49-52, write each Ionic Greek numeral...Ch. 4.4 - Prob. 51ECh. 4.4 - Prob. 52ECh. 4.4 - Prob. 53ECh. 4.4 - Prob. 54ECh. 4.4 - Prob. 55ECh. 4.4 - Prob. 56ECh. 4.4 - Prob. 57ECh. 4.4 - Prob. 58ECh. 4.4 - Prob. 59ECh. 4.4 - Prob. 60ECh. 4.4 - Prob. 61ECh. 4.4 - Prob. 62ECh. 4.4 - Prob. 63ECh. 4.4 - Prob. 64ECh. 4.4 - Prob. 65ECh. 4.4 - Prob. 66ECh. 4.4 - Prob. 67ECh. 4.4 - Prob. 68ECh. 4.4 - Prob. 69ECh. 4.4 - Prob. 70ECh. 4.4 - Describe how a number is represented in the...Ch. 4.4 - Prob. 72ECh. 4.4 - Prob. 73ECh. 4.4 - Prob. 74ECh. 4.4 - Prob. 75ECh. 4.4 - Prob. 76ECh. 4.4 - Prob. 77ECh. 4.4 - Make Sense? In Exercises 76-79, determine whether...Ch. 4.4 - Make Sense? In Exercises 76-79, determine whether...Ch. 4.4 - Prob. 80ECh. 4.4 - Prob. 81ECh. 4.4 - Prob. 82ECh. 4.4 - Prob. 83ECh. 4.4 - Prob. 84ECh. 4.4 - Prob. 85ECh. 4.4 - Prob. 86ECh. 4.4 - Prob. 87ECh. 4 - In Exercises 1-2, evaluate the expression 11 2Ch. 4 - Prob. 2RECh. 4 - Prob. 3RECh. 4 - Prob. 4RECh. 4 - Prob. 5RECh. 4 - Prob. 6RECh. 4 - Prob. 7RECh. 4 - Prob. 8RECh. 4 - Prob. 9RECh. 4 - Prob. 10RECh. 4 - Prob. 11RECh. 4 - Prob. 12RECh. 4 - Prob. 13RECh. 4 - Prob. 14RECh. 4 - Prob. 15RECh. 4 - In Exercises 13-18, convert the numeral to a...Ch. 4 - Prob. 17RECh. 4 - Prob. 18RECh. 4 - Prob. 19RECh. 4 - Prob. 20RECh. 4 - Prob. 21RECh. 4 - Prob. 22RECh. 4 - Prob. 23RECh. 4 - Prob. 24RECh. 4 - In Exercises 25-28, add in the indicated base.
25....Ch. 4 - In Exercises 25-28, add in the indicated base.
26....Ch. 4 - Prob. 27RECh. 4 - Prob. 28RECh. 4 - Prob. 29RECh. 4 - Prob. 30RECh. 4 - Prob. 31RECh. 4 - In Exercises 29-32, subtract in the indicated...Ch. 4 - Prob. 33RECh. 4 - Prob. 34RECh. 4 - Prob. 35RECh. 4 - Prob. 36RECh. 4 - Prob. 37RECh. 4 - Prob. 38RECh. 4 - Prob. 39RECh. 4 - Prob. 40RECh. 4 - Prob. 41RECh. 4 - Prob. 42RECh. 4 - Prob. 43RECh. 4 - 44. Describe how the Egyptian system or the system...Ch. 4 - Prob. 45RECh. 4 - Prob. 46RECh. 4 - Prob. 47RECh. 4 - Prob. 48RECh. 4 - Prob. 49RECh. 4 - Prob. 50RECh. 4 - Prob. 51RECh. 4 - Use Table 4.8 on page 239 to solve Exercises...Ch. 4 - Prob. 53RECh. 4 - Prob. 54RECh. 4 - Prob. 55RECh. 4 - Prob. 56RECh. 4 - Prob. 57RECh. 4 - Prob. 58RECh. 4 - Describe how the Chinese system or the system in...Ch. 4 - Prob. 60RECh. 4 - Prob. 61RECh. 4 - In Exercises 62-63, write each Hindu-Arabic...Ch. 4 - In Exercises 62-63, write each Hindu-Arabic...Ch. 4 - Prob. 64RECh. 4 - Prob. 65RECh. 4 - Prob. 66RECh. 4 - Prob. 67RECh. 4 - Prob. 68RECh. 4 - Prob. 69RECh. 4 - Prob. 1TCh. 4 - Prob. 2TCh. 4 - Prob. 3TCh. 4 - 4. Express as a Hindu-Arabic numeral:
Ch. 4 - Prob. 5TCh. 4 - Prob. 6TCh. 4 - 7. Explain why a symbol for zero is needed in a...Ch. 4 - Prob. 8TCh. 4 - 9. Place values in the Mayan system are
Use the...Ch. 4 - In Exercises 10-12, convert the numeral to a...Ch. 4 - In Exercises 10-12, convert the numeral to a...Ch. 4 - In Exercises 10-12, convert the numeral to a...Ch. 4 - In Exercises 13-15, convert each base ten numeral...Ch. 4 - In Exercises 13-15, convert each base ten numeral...Ch. 4 - In Exercises 13-15, convert each base ten numeral...Ch. 4 - Prob. 16TCh. 4 - In Exercises 16-18, perform the indicated...Ch. 4 - In Exercises 16-18, perform the indicated...Ch. 4 - Prob. 19TCh. 4 - Prob. 20TCh. 4 - Use the symbols in the table shown below to solve...Ch. 4 - Prob. 22TCh. 4 - Use the symbols in the table shown below to solve...Ch. 4 - Prob. 24T
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- For unemployed persons in the United States, the average number of months of unemployment at the end of December 2009 was approximately seven months (Bureau of Labor Statistics, January 2010). Suppose the following data are for a particular region in upstate New York. The values in the first column show the number of months unemployed and the values in the second column show the corresponding number of unemployed persons. Months Unemployed Number Unemployed 1 1029 2 1686 3 2269 4 2675 5 3487 6 4652 7 4145 8 3587 9 2325 10 1120 Let x be a random variable indicating the number of months a person is unemployed. a. Use the data to develop an empirical discrete probability distribution for x (to 4 decimals). (x) f(x) 1 2 3 4 5 6 7 8 9 10 b. Show that your probability distribution satisfies the conditions for a valid discrete probability distribution. The input in the box below will not be graded, but may be reviewed and considered by your instructor. c. What is the probability that a person…arrow_forwardIn Gallup's Annual Consumption Habits Poll, telephone interviews were conducted for a random sample of 1014 adults aged 18 and over. One of the questions was "How many cups of coffee, if any, do you drink on an average day?" The following table shows the results obtained (Gallup website, August 6, 2012). Excel File: data05-23.xls Number of Cups per Day Number of Responses 0 365 264 193 3 4 or more 91 101 Define a random variable x = number of cups of coffee consumed on an average day. Let x = 4 represent four or more cups. Round your answers to four decimal places. a. Develop a probability distribution for x. x 0 1 2 3 4 f(x) b. Compute the expected value of x. cups of coffee c. Compute the variance of x. cups of coffee squared d. Suppose we are only interested in adults that drink at least one cup of coffee on an average day. For this group, let y = the number of cups of coffee consumed on an average day. Compute the expected value of y. Compare it to the expected value of x. The…arrow_forwardrounded to two decimal places at each calculationarrow_forward
- In Gallup's Annual Consumption Habits Poll, telephone interviews were conducted for a random sample of 1014 adults aged 18 and over. One of the questions was "How many cups of coffee, if any, do you drink on an average day?" The following table shows the results obtained (Gallup website, August 6, 2012). Excel File: data05-23.xls Number of Cups per Day Number of Responses 0 365 264 193 2 3 4 or more 91 101 Define a random variable x = number of cups of coffee consumed on an average day. Let x = 4 represent four or more cups. Round your answers to four decimal places. a. Develop a probability distribution for x. x 0 1 2 3 f(x) b. Compute the expected value of x. cups of coffee c. Compute the variance of x. cups of coffee squared d. Suppose we are only interested in adults that drink at least one cup of coffee on an average day. For this group, let y = the number of cups of coffee consumed on an average day. Compute the expected value of y. Compare it to the expected value of x. The…arrow_forwardA technician services mailing machines at companies in the Phoenix area. Depending on the type of malfunction, the service call can take 1, 2, 3, or 4 hours. The different types of malfunctions occur at about the same frequency. Develop a probability distribution for the duration of a service call. Duration of Call x f(x) 1 2 3 4 Which of the following probability distribution graphs accurately represents the data set? Consider the required conditions for a discrete probability function, shown below.Does this probability distribution satisfy equation (5.1)?Does this probability distribution satisfy equation (5.2)? What is the probability a service call will take three hours? A service call has just come in, but the type of malfunction is unknown. It is 3:00 P.M. and service technicians usually get off at 5:00 P.M. What is the probability the service technician will have to work overtime to fix the machine today?arrow_forwardA psychologist determined that the number of sessions required to obtain the trust of a new patient is either 1, 2, or 3. Let x be a random variable indicating the number of sessions required to gain the patient's trust. The following probability function has been proposed. x f(x) for x = 1, 2, or 3 a. Consider the required conditions for a discrete probability function, shown below. f(x) ≥0 Σf(x) = 1 (5.1) (5.2) Does this probability distribution satisfy equation (5.1)? Select Does this probability distribution satisfy equation (5.2)? Select b. What is the probability that it takes exactly 2 sessions to gain the patient's trust (to 3 decimals)? c. What is the probability that it takes at least 2 sessions to gain the patient's trust (to 3 decimals)?arrow_forward
- A technician services mailing machines at companies in the Phoenix area. Depending on the type of malfunction, the service call can take 1, 2, 3, or 4 hours. The different types of malfunctions occur at about the same frequency. Develop a probability distribution for the duration of a service call. Which of the following probability distribution graphs accurately represents the data set? Consider the required conditions for a discrete probability function, shown below.Does this probability distribution satisfy equation (5.1)?Does this probability distribution satisfy equation (5.2)? What is the probability a service call will take three hours? A service call has just come in, but the type of malfunction is unknown. It is 3:00 P.M. and service technicians usually get off at 5:00 P.M. What is the probability the service technician will have to work overtime to fix the machine today?arrow_forwardWest Virginia has one of the highest divorce rates in the nation, with an annual rate of approximately 5 divorces per 1000 people (Centers for Disease Control and Prevention website, January 12, 2012). The Marital Counseling Center, Inc. (MCC) thinks that the high divorce rate in the state may require them to hire additional staff. Working with a consultant, the management of MCC has developed the following probability distribution for x = the number of new clients for marriage counseling for the next year. Excel File: data05-19.xls 10 20 f(x) .05 .10 11 30 40 50 60 .10 .20 .35 .20 a. Is this probability distribution valid? Yes Explain. greater than or equal to 0 f(x) Σf(x) equal to 1 b. What is the probability MCC will obtain more than 30 new clients (to 2 decimals)? c. What is the probability MCC will obtain fewer than 20 new clients (to 2 decimals)? d. Compute the expected value and variance of x. Expected value Variance clients per year squared clients per yeararrow_forwardUse Variation of Parameters to solvearrow_forward
- Use the method of washers to find the volume of the solid that is obtained when the region between the graphs f(x) = √√2 and g(x) = secx over the interval ≤x≤ is rotated about the x-axis.arrow_forward5 Use the method of disks to find the volume of the solid that is obtained when the region under the curve y = over the interval [4,17] is rotated about the x-axis.arrow_forward3. Use the method of washers to find the volume of the solid that is obtained when the region between the graphs f(x) = √√2 and g(x) = secx over the interval ≤x≤ is rotated about the x-axis.arrow_forward
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