THINKING MATHEMATICALLY
7th Edition
ISBN: 9780135961841
Author: Blitzer
Publisher: PEARSON
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Chapter 9, Problem 26RE
To determine
To calculate: The value of
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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 9 Solutions
THINKING MATHEMATICALLY
Ch. 9.1 - CHECK POINT 1 Convert: a. 78 inches to feet b....Ch. 9.1 - CHECK POINT 2
a. Convert 8000 meters to...Ch. 9.1 - CHECK POINT 3 a. Convert 8 feet to centimeters. b....Ch. 9.1 - CHECK POINT 4 A road in Europe has a speed limit...Ch. 9.1 - The result obtained from measuring length is...Ch. 9.1 - In the English system, _________ in. = 1 ft,...Ch. 9.1 - Fractions such as 12 in . 1 ft and 1 yd 3 ...Ch. 9.1 - In the metric system, 1 km= __________ m, l hm =...Ch. 9.1 - In Exercises 5-8, determine whether each statement...Ch. 9.1 - In Exercises 5-8, determine whether each statement...
Ch. 9.1 - Prob. 7CVCCh. 9.1 - Prob. 8CVCCh. 9.1 - In Exercises 1-16, use dimensional analysis to...Ch. 9.1 - In Exercises 1-16, use dimensional analysis to...Ch. 9.1 - In Exercises 1-16, use dimensional analysis to...Ch. 9.1 - In Exercises 1-16, use dimensional analysis to...Ch. 9.1 - In Exercises 1-16, use dimensional analysis to...Ch. 9.1 - In Exercises 1-16, use dimensional analysis to...Ch. 9.1 - In Exercises 1-16, use dimensional analysis to...Ch. 9.1 - In Exercises 1-16, use dimensional analysis to...Ch. 9.1 - In Exercises 1-16, use dimensional analysis to...Ch. 9.1 - In Exercises 1-16, use dimensional analysis to...Ch. 9.1 - In Exercises 1-16, use dimensional analysis to...Ch. 9.1 - In Exercises 1-16, use dimensional analysis to...Ch. 9.1 - In Exercises 1-16, use dimensional analysis to...Ch. 9.1 - In Exercises 1-16, use dimensional analysis to...Ch. 9.1 - In Exercises 1-16, use dimensional analysis to...Ch. 9.1 - In Exercises 1-16, use dimensional analysis to...Ch. 9.1 - In Exercises 17-26, use the diagram in the box on...Ch. 9.1 - In Exercises 17-26, use the diagram in the box on...Ch. 9.1 - In Exercises 17-26, use the diagram in the box on...Ch. 9.1 - In Exercises 17-26, use the diagram in the box on...Ch. 9.1 - In Exercises 17-26, use the diagram in the box on...Ch. 9.1 - In Exercises 17-26, use the diagram in the box on...Ch. 9.1 - In Exercises 17-26, use the diagram in the box on...Ch. 9.1 - In Exercises 17-26, use the diagram in the box on...Ch. 9.1 - In Exercises 17-26, use the diagram in the box on...Ch. 9.1 - In Exercises 17-26, use the diagram in the box on...Ch. 9.1 - In Exercises 27-44, use the following English and...Ch. 9.1 - In Exercises 27-44, use the following English and...Ch. 9.1 - In Exercises 27-44, use the following English and...Ch. 9.1 - In Exercises 27-44, use the following English and...Ch. 9.1 - In Exercises 27-44, use the following English and...Ch. 9.1 - In Exercises 27-44, use the following English and...Ch. 9.1 - Prob. 33ECh. 9.1 - In Exercises 27-44, use the following English and...Ch. 9.1 - In Exercises 27-44, use the following English and...Ch. 9.1 - Prob. 36ECh. 9.1 - In Exercises 27-44, use the following English and...Ch. 9.1 - In Exercises 27-44, use the following English and...Ch. 9.1 - In Exercises 27-44, use the following English and...Ch. 9.1 - In Exercises 27-44, use the following English and...Ch. 9.1 - In Exercises 27-44, use the following English and...Ch. 9.1 - Prob. 42ECh. 9.1 - In Exercises 27-44, use the following English and...Ch. 9.1 - Prob. 44ECh. 9.1 - Use 1 mi ≈ 1 .6 km to solve Exercises 45-48....Ch. 9.1 - Prob. 46ECh. 9.1 - Use 1 mi ≈ 1 .6 km to solve Exercises 45-48....Ch. 9.1 - Use 1 mi ≈ 1 .6 km to solve Exercises 45-48....Ch. 9.1 - In Exercises 49-52, use the unit fractions 36 in...Ch. 9.1 - In Exercises 49-52, use the unit fractions 36 in...Ch. 9.1 - In Exercises 49-52, use the unit fractions
51....Ch. 9.1 - In Exercises 49-52, use the unit fractions 36 in...Ch. 9.1 - In Exercises 53-54, use the unit fractions
53....Ch. 9.1 - In Exercises 53-54, use the unit fractions 5280 ...Ch. 9.1 - Use unit fractions to express 120 miles per hour...Ch. 9.1 - Prob. 56ECh. 9.1 - In Exercises 57-66, selecting from millimeter,...Ch. 9.1 - In Exercises 57-66, selecting from millimeter,...Ch. 9.1 - In Exercises 57-66, selecting from millimeter,...Ch. 9.1 - In Exercises 57-66, selecting from millimeter,...Ch. 9.1 - Prob. 61ECh. 9.1 - Prob. 62ECh. 9.1 - In Exercises 57-66, selecting from millimeter,...Ch. 9.1 - In Exercises 57-66, selecting from millimeter,...Ch. 9.1 - In Exercises 57-66, selecting from millimeter,...Ch. 9.1 - In Exercises 57-66, selecting from millimeter,...Ch. 9.1 - Prob. 67ECh. 9.1 - Prob. 68ECh. 9.1 - Prob. 69ECh. 9.1 - Prob. 70ECh. 9.1 - Prob. 71ECh. 9.1 - In Exercises 67-74, select the best estimate for...Ch. 9.1 - In Exercises 67-74, select the best estimate for...Ch. 9.1 - Prob. 74ECh. 9.1 - Prob. 75ECh. 9.1 - Prob. 76ECh. 9.1 - Prob. 77ECh. 9.1 - Prob. 78ECh. 9.1 - Prob. 79ECh. 9.1 - Exercises 79-80 give the approximate length of...Ch. 9.1 - Prob. 81ECh. 9.1 - Exercises 81-82 give the approximate height of...Ch. 9.1 - Exercises 83-84 give the average rainfall of some...Ch. 9.1 - Prob. 84ECh. 9.1 - Prob. 85ECh. 9.1 - 86. Describe how to use dimensional analysis to...Ch. 9.1 - Prob. 87ECh. 9.1 - Prob. 88ECh. 9.1 - Prob. 89ECh. 9.1 - What kind of difficulties might arise if the...Ch. 9.1 - Prob. 91ECh. 9.1 - Prob. 92ECh. 9.1 - Make Sense? In Exercises 92-95, determine whether...Ch. 9.1 - Prob. 94ECh. 9.1 - Prob. 95ECh. 9.1 - Prob. 96ECh. 9.1 - Prob. 97ECh. 9.1 - Prob. 98ECh. 9.1 - Prob. 99ECh. 9.1 - Prob. 100ECh. 9.2 - CHECK POINT 1 What is the area of the region...Ch. 9.2 - CHECK POINT 2 The population of California is...Ch. 9.2 - Prob. 3CPCh. 9.2 - CHECK POINT 4 A property in northern California is...Ch. 9.2 - CHECK POINT 5 What is the volume of the region...Ch. 9.2 - CHECK POINT 6 A pool has a volume of 10,000 cubic...Ch. 9.2 - CHECK POINT 7 A fish pond has a volume of 220,000...Ch. 9.2 - CHECK POINT 8 A physician orders 20 cc of the...Ch. 9.2 - Prob. 1CVCCh. 9.2 - Prob. 2CVCCh. 9.2 - Because 1 mi 2 = 640 acres, the unit fraction...Ch. 9.2 - Prob. 4CVCCh. 9.2 - Prob. 5CVCCh. 9.2 - Prob. 6CVCCh. 9.2 - Prob. 7CVCCh. 9.2 - In Exercises 8-10, determine whether each...Ch. 9.2 - In Exercises 8-10, determine whether each...Ch. 9.2 - In Exercises 8-10, determine whether each...Ch. 9.2 - Prob. 1ECh. 9.2 - In Exercises 1-4, use the given figure to find its...Ch. 9.2 - In Exercises 1-4, use the given figure to find its...Ch. 9.2 - In Exercises 1-4, use the given figure to find its...Ch. 9.2 - In Exercises 5-12, use Table 9.4 on page 588,...Ch. 9.2 - In Exercises 5-12, use Table 9.4 on page 588,...Ch. 9.2 - In Exercises 5-12, use Table 9.4 on page 588,...Ch. 9.2 - In Exercises 5-12, use Table 9.4 on page 588,...Ch. 9.2 - In Exercises 5-12, use Table 9.4 on page 588,...Ch. 9.2 - Prob. 10ECh. 9.2 - In Exercises 5-12, use Table 9.4 on page 588,...Ch. 9.2 - Prob. 12ECh. 9.2 - In Exercises 13-14, use the given figure to find...Ch. 9.2 - In Exercises 13-14, use the given figure to find...Ch. 9.2 - In Exercises 15-22, use Table 9.5 on page590,...Ch. 9.2 - In Exercises 15-22, use Table 9.5 on page590,...Ch. 9.2 - In Exercises 15-22, use Table 9.5 on page590,...Ch. 9.2 - In Exercises 15-22, use Table 9.5 on page590,...Ch. 9.2 - In Exercises 15-22, use Table 9.5 on page590,...Ch. 9.2 - In Exercises 15-22, use Table 9.5 on page590,...Ch. 9.2 - In Exercises 15-22, use Table 9.5 on page590,...Ch. 9.2 - In Exercises 15-22, use Table 9.5 on page590,...Ch. 9.2 - In Exercises 23-32, use Table 9.7 on page 591,...Ch. 9.2 - Prob. 24ECh. 9.2 - In Exercises 23-32, use Table 9.7 on page 591,...Ch. 9.2 - Prob. 26ECh. 9.2 - In Exercises 23-32, use Table 9.7 on page 591,...Ch. 9.2 - Prob. 28ECh. 9.2 - Prob. 29ECh. 9.2 - Prob. 30ECh. 9.2 - Prob. 31ECh. 9.2 - Prob. 32ECh. 9.2 - In Exercises 33-48, use Table 9.8 on page 591,...Ch. 9.2 - Prob. 34ECh. 9.2 - Prob. 35ECh. 9.2 - Prob. 36ECh. 9.2 - Prob. 37ECh. 9.2 - Prob. 38ECh. 9.2 - In Exercises 33-48, use Table 9.8 on page 591,...Ch. 9.2 - Prob. 40ECh. 9.2 - Prob. 41ECh. 9.2 - In Exercises 33-48, use Table 9.8 on page 591,...Ch. 9.2 - Prob. 43ECh. 9.2 - Prob. 44ECh. 9.2 - In Exercises 33-48, use Table 9.8 on page 591,...Ch. 9.2 - Prob. 46ECh. 9.2 - In Exercises 33-48, use Table 9.8 on page 591,...Ch. 9.2 - In Exercises 33-48, use Table 9.8 on page 591,...Ch. 9.2 - The bar graph shows the resident population and...Ch. 9.2 - The bar graph shows the resident population and...Ch. 9.2 - The bar graph shows the resident population and...Ch. 9.2 - Prob. 52ECh. 9.2 - In Exercises 53-54, find the population density,...Ch. 9.2 - In Exercises 53-54, find the population density,...Ch. 9.2 - Prob. 55ECh. 9.2 - Prob. 56ECh. 9.2 - A property that measures 8 hectares is for sale....Ch. 9.2 - Prob. 58ECh. 9.2 - Prob. 59ECh. 9.2 - Prob. 60ECh. 9.2 - Prob. 61ECh. 9.2 - Prob. 62ECh. 9.2 - Prob. 63ECh. 9.2 - Prob. 64ECh. 9.2 - Prob. 65ECh. 9.2 - Prob. 66ECh. 9.2 - Prob. 67ECh. 9.2 - Prob. 68ECh. 9.2 - Prob. 69ECh. 9.2 - Prob. 70ECh. 9.2 - Prob. 71ECh. 9.2 - Prob. 72ECh. 9.2 - Exercises 73-74 give the approximate area of some...Ch. 9.2 - Exercises 73-74 give the approximate area of some...Ch. 9.2 - (Source for Exercises 71-74: Russell Ash, The Top...Ch. 9.2 - Prob. 76ECh. 9.2 - Prob. 77ECh. 9.2 - Prob. 78ECh. 9.2 - Prob. 79ECh. 9.2 - Prob. 80ECh. 9.2 - Prob. 81ECh. 9.2 - Prob. 82ECh. 9.2 - Prob. 83ECh. 9.2 - Prob. 84ECh. 9.2 - Prob. 85ECh. 9.2 - Prob. 86ECh. 9.2 - Prob. 87ECh. 9.2 - 88. Nebraska has a population density of 23.8...Ch. 9.2 - Prob. 89ECh. 9.2 - Prob. 90ECh. 9.2 - Prob. 91ECh. 9.2 - Prob. 92ECh. 9.2 - Prob. 93ECh. 9.3 - CHECK POINT I a. Convert 4.2 dg to mg. b. Convert...Ch. 9.3 - Prob. 2CPCh. 9.3 - Prob. 3CPCh. 9.3 - Prob. 4CPCh. 9.3 - Prob. 5CPCh. 9.3 - Prob. 6CPCh. 9.3 - Prob. 1CVCCh. 9.3 - Prob. 2CVCCh. 9.3 - Prob. 3CVCCh. 9.3 - Prob. 4CVCCh. 9.3 - On the Fahrenheit temperature scale, water freezes...Ch. 9.3 - 6. On the Celsius temperature scale, water freezes...Ch. 9.3 - Prob. 7CVCCh. 9.3 - Prob. 8CVCCh. 9.3 - Prob. 9CVCCh. 9.3 - Prob. 10CVCCh. 9.3 - In Exercises 1-10, convert the given unit of...Ch. 9.3 - In Exercises 1-10, convert the given unit of...Ch. 9.3 - In Exercises 1-10, convert the given unit of...Ch. 9.3 - In Exercises 1-10, convert the given unit of...Ch. 9.3 - In Exercises 1-10, convert the given unit of...Ch. 9.3 - In Exercises 1-10, convert the given unit of...Ch. 9.3 - In Exercises 1-10, convert the given unit of...Ch. 9.3 - In Exercises 1-10, convert the given unit of...Ch. 9.3 - In Exercises 1-10, convert the given unit of...Ch. 9.3 - In Exercises 1-10, convert the given unit of...Ch. 9.3 - In Exercises 11-18, use Table 9.10 on page 598 to...Ch. 9.3 - In Exercises 11-18, use Table 9.10 on page 598 to...Ch. 9.3 - In Exercises 11-18, use Table 9.10 on page 598 to...Ch. 9.3 - In Exercises 11-18, use Table 9.10 on page 598 to...Ch. 9.3 - In Exercises 11-18, use Table 9.10 on page 598 to...Ch. 9.3 - In Exercises 11-18, use Table 9.10 on page 598 to...Ch. 9.3 - In Exercises 11-18, use Table 9.10 on page 598 to...Ch. 9.3 - In Exercises 11-18, use Table 9.10 on page 598 to...Ch. 9.3 - In Exercises 19-30, use the following equivalents,...Ch. 9.3 - In Exercises 19-30, use the following equivalents,...Ch. 9.3 - In Exercises 19-30, use the following equivalents,...Ch. 9.3 - In Exercises 19-30, use the following equivalents,...Ch. 9.3 - In Exercises 19-30, use the following equivalents,...Ch. 9.3 - In Exercises 19-30, use the following equivalents,...Ch. 9.3 - In Exercises 19-30, use the following equivalents,...Ch. 9.3 - In Exercises 19-30, use the following equivalents,...Ch. 9.3 - In Exercises 19-30, use the following equivalents,...Ch. 9.3 - In Exercises 19-30, use the following equivalents,...Ch. 9.3 - In Exercises 19-30, use the following equivalents,...Ch. 9.3 - In Exercises 19-30, use the following equivalents,...Ch. 9.3 - In Exercises 31-38, convert the given Celsius...Ch. 9.3 - In Exercises 31-38, convert the given Celsius...Ch. 9.3 - In Exercises 31—38, convert the given Celsius...Ch. 9.3 - In Exercises 31-38, convert the given Celsius...Ch. 9.3 - In Exercises 31-38, convert the given Celsius...Ch. 9.3 - In Exercises 31-38, convert the given Celsius...Ch. 9.3 - In Exercises 31-38, convert the given Celsius...Ch. 9.3 - In Exercises 31—38, convert the given Celsius...Ch. 9.3 - Prob. 39ECh. 9.3 - Prob. 40ECh. 9.3 - In Exercises 39-50, convert the given Fahrenheit...Ch. 9.3 - In Exercises 39-50, convert the given Fahrenheit...Ch. 9.3 - Prob. 43ECh. 9.3 - In Exercises 39-50, convert the given Fahrenheit...Ch. 9.3 - In Exercises 39-50, convert the given Fahrenheit...Ch. 9.3 - 46.
In Exercises 39-50, convert the given...Ch. 9.3 - In Exercises 39-50, convert the given Fahrenheit...Ch. 9.3 - Prob. 48ECh. 9.3 - Prob. 49ECh. 9.3 - Prob. 50ECh. 9.3 - Prob. 51ECh. 9.3 - Prob. 52ECh. 9.3 - Prob. 53ECh. 9.3 - Prob. 54ECh. 9.3 - Prob. 55ECh. 9.3 - Prob. 56ECh. 9.3 - Prob. 57ECh. 9.3 - Prob. 58ECh. 9.3 - Prob. 59ECh. 9.3 - Prob. 60ECh. 9.3 - Prob. 61ECh. 9.3 - Prob. 62ECh. 9.3 - Prob. 63ECh. 9.3 - Prob. 64ECh. 9.3 - Prob. 65ECh. 9.3 - Prob. 66ECh. 9.3 -
Ch. 9.3 - Prob. 68ECh. 9.3 - Prob. 69ECh. 9.3 - Prob. 70ECh. 9.3 - Which is more economical: purchasing the economy...Ch. 9.3 - Exercises 72-73 ask you to determine drug dosage...Ch. 9.3 -
Ch. 9.3 - Prob. 74ECh. 9.3 - The label on a bottle of Emetrol (“for food or...Ch. 9.3 - Prob. 76ECh. 9.3 - Prob. 77ECh. 9.3 - Prob. 78ECh. 9.3 - Prob. 79ECh. 9.3 - Prob. 80ECh. 9.3 - Prob. 81ECh. 9.3 - Prob. 82ECh. 9.3 - Prob. 83ECh. 9.3 - Prob. 84ECh. 9.3 - Prob. 85ECh. 9.3 - Prob. 86ECh. 9.3 - Prob. 87ECh. 9.3 - Prob. 88ECh. 9.3 - Prob. 89ECh. 9.3 - Prob. 90ECh. 9.3 - Prob. 91ECh. 9.3 - Prob. 92ECh. 9.3 - Prob. 93ECh. 9.3 - Prob. 94ECh. 9.3 - Prob. 95ECh. 9.3 - Prob. 96ECh. 9.3 - Prob. 97ECh. 9.3 - Prob. 98ECh. 9.3 - Prob. 99ECh. 9.3 - Prob. 100ECh. 9.3 - Prob. 101ECh. 9.3 - Prob. 102ECh. 9 - In Exercises 1-4, use dimensional analysis to...Ch. 9 - In Exercises 1-4, use dimensional analysis to...Ch. 9 - In Exercises 1-4, use dimensional analysis to...Ch. 9 - In Exercises 1-4, use dimensional analysis to...Ch. 9 - Prob. 5RECh. 9 - Prob. 6RECh. 9 - Prob. 7RECh. 9 - Prob. 8RECh. 9 - Prob. 9RECh. 9 - Prob. 10RECh. 9 - Prob. 11RECh. 9 - Prob. 12RECh. 9 - Prob. 13RECh. 9 - Prob. 14RECh. 9 - Prob. 15RECh. 9 - Prob. 16RECh. 9 - Prob. 17RECh. 9 - Prob. 18RECh. 9 - 19. Arrange from smallest to largest: 0.024 km,...Ch. 9 - Prob. 20RECh. 9 - Prob. 21RECh. 9 - Prob. 22RECh. 9 - Prob. 23RECh. 9 - Prob. 24RECh. 9 - Prob. 25RECh. 9 - Prob. 26RECh. 9 - Prob. 27RECh. 9 - Prob. 28RECh. 9 - Prob. 29RECh. 9 - Prob. 30RECh. 9 - Prob. 31RECh. 9 - Prob. 32RECh. 9 - Prob. 33RECh. 9 - Prob. 34RECh. 9 - Prob. 35RECh. 9 - Prob. 36RECh. 9 - Prob. 37RECh. 9 - 38. Explain why the area of Texas could not be...Ch. 9 - Prob. 39RECh. 9 - Prob. 40RECh. 9 - Prob. 41RECh. 9 - Prob. 42RECh. 9 - Prob. 43RECh. 9 - Prob. 44RECh. 9 - Prob. 45RECh. 9 - 46. Using 1 , convert 392 grams to ounces.
Ch. 9 - Prob. 47RECh. 9 - Prob. 48RECh. 9 - Prob. 49RECh. 9 - Prob. 50RECh. 9 - In Exercises 50-51, select the best estimate for...Ch. 9 - Prob. 52RECh. 9 - Prob. 53RECh. 9 - Prob. 54RECh. 9 - Prob. 55RECh. 9 - Prob. 56RECh. 9 - Prob. 57RECh. 9 - Prob. 58RECh. 9 - Prob. 59RECh. 9 - Prob. 60RECh. 9 - Prob. 61RECh. 9 - Prob. 62RECh. 9 - Prob. 63RECh. 9 - Prob. 1TCh. 9 - Prob. 2TCh. 9 - Prob. 3TCh. 9 - In Exercises 4-6, write the most reasonable metric...Ch. 9 - Prob. 5TCh. 9 - Prob. 6TCh. 9 - 7. If 1 mile 1.6 kilometers, express 80 miles per...Ch. 9 - Prob. 8TCh. 9 - Australia has a population of 22,992,654 and an...Ch. 9 - Prob. 10TCh. 9 - 11. The area of a dollar bill is...Ch. 9 - Prob. 12TCh. 9 - 13. The label on a bottle of Pepto Bismol...Ch. 9 - 14. A swimming pool has a volume of 10,000 cubic...Ch. 9 - 15. The capacity of a pail used to wash floors is...Ch. 9 - Prob. 16TCh. 9 - 17. The prescribed dosage of a drug is 10 mg/kg...Ch. 9 - In Exercises 18-19, write the most reasonable...Ch. 9 - Prob. 19TCh. 9 - Prob. 20TCh. 9 - 21. Convert 176°F to Celsius.
Ch. 9 - Prob. 22T
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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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