EP FINITE MATH.F/BUS,ECON,LIFE..-ACCESS
14th Edition
ISBN: 9780135988244
Author: Barnett
Publisher: PEARSON CO
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Textbook Question
Chapter 1, Problem 7RE
Solve Problems 5-7 and graph on a real number line.
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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).
Number of Cups
per Day
0
1
2
3
4 or more
Number of
Responses
365
264
193
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.
a. Develop a probability distribution for x.
b. Compute the expected value of x.
c. Compute the variance of x.
d. Suppose we are only interested in adults who 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 and compare it to the expected value of x.
Ten major college football bowl games were played in January 2010, with the University
of Alabama beating the University of Texas 37 to 21 to become the national champion
of college football. The results of the 10 bowl games follow (USA Today, January 8, 2010).
Bowl Game
Score
Outback
Gator
Auburn 38 Northwestern 35
Florida State 33 West Virginia 21
Capital One
Penn State 19 LSU 17
Rose
Ohio State 26 Oregon 17
Florida 51 Cincinnati 24
Sugar
Cotton
Alamo
Fiesta
Mississippi State 21 Oklahoma State 7
Texas Tech 41 Michigan State 31
Boise State 17 TCU 10
Orange
Iowa 24 Georgia Tech 14
Championship
Alabama 37 Texas 21
Predicted
Point Margin
Actual
Point Margin
5
3
1
12
3
-2
14
3
9
-4
-3
4
229740706
14
10
10
16
The predicted winning point margin was based on Las Vegas betting odds approximately
one week before the bowl games were played. For example, Auburn was predicted to beat
Northwestern in the Outback Bowl by five points. The actual winning point margin for Au-
burn was three points. A…
In 2007 the New York Times reported that the median annual household income in the United
States was $55,500 (New York Times website, August, 21, 2013). Answer the following
questions based on the following sample of 14 household incomes for 2013 ($1000s).
49.4
52.2
52.4
53.4
51.3
52.1
48.7
64.5
51.6
46.5
52.9
52.5
52.1
51.2
a.
What is the median household income for the sample data for 2013?
b. Based on the sample data, estimate the percentage change in the median household
income from 2007 to 2013.
c. Compute the first and third quartiles.
Chapter 1 Solutions
EP FINITE MATH.F/BUS,ECON,LIFE..-ACCESS
Ch. 1.1 - According to equality property 2, multiplying both...Ch. 1.1 - Replace ? with < or > in each of the following:...Ch. 1.1 - The solution to Example 5B shows the graph of the...Ch. 1.1 - Solve and check: 3x2(2x5)=2(x+3)8Ch. 1.1 - Solve and check: x+13x4=12Ch. 1.1 - Matched Problem 3 If a cardboard box has length L,...Ch. 1.1 - Replace each question mark with either < or >....Ch. 1.1 - (A) Write 7,4 as a double inequality and graph....Ch. 1.1 - Solve and graph: 3(x1)5(x+2)5Ch. 1.1 - Solve and graph: 83x57
Ch. 1.1 - Mary paid 8.5 sales tax and a 190 title and...Ch. 1.1 - How many bike computers would a company have to...Ch. 1.1 - What net annual salary in 1973 would have had the...Ch. 1.1 - In Problems 1-6, solve for x. 5x+3=x+23Ch. 1.1 - In Problems 1-6, solve for x. 7x6=5x24Ch. 1.1 - In Problems 1-6, solve for x. 9(4x)=2(x+7)Ch. 1.1 - In Problems 1-6, solve for x. 3(x+6)=52(x+1)Ch. 1.1 - In Problems 1-6, solve for x. x+14=x2+5Ch. 1.1 - In Problems 1-6, solve for x. 2x+135x2=4Ch. 1.1 - In Problems 7-12, write the interval as an...Ch. 1.1 - In Problems 7-12, write the interval as an...Ch. 1.1 - In Problems 7-12, write the interval as an...Ch. 1.1 - In Problems 7-12, write the interval as an...Ch. 1.1 - In Problems 7-12, write the interval as an...Ch. 1.1 - In Problems 7-12, write the interval as an...Ch. 1.1 - In Problems 13-18, write the solution set using...Ch. 1.1 - In Problems 13-18, write the solution set using...Ch. 1.1 - In Problems 13-18, write the solution set using...Ch. 1.1 - In Problems 13-18, write the solution set using...Ch. 1.1 - In Problems 13-18, write the solution set using...Ch. 1.1 - In Problems 13-18, write the solution set using...Ch. 1.1 - In Problems 19-32, find the solution set. x4+12=18Ch. 1.1 - In Problems 19-32, find the solution set. m34=23Ch. 1.1 - In Problems 19-32, find the solution set. y532Ch. 1.1 - In Problems 19-32, find the solution set. x456Ch. 1.1 - In Problems 19-32, find the solution set....Ch. 1.1 - In Problems 19-32, find the solution set....Ch. 1.1 - In Problems 19-32, find the solution set....Ch. 1.1 - In Problems 19-32, find the solution set. 34x=5x+1Ch. 1.1 - In Problems 19-32, find the solution set. 3y4y3Ch. 1.1 - In Problems 19-32, find the solution set. x22x5Ch. 1.1 - In Problems 19-32, find the solution set. x5x6=65Ch. 1.1 - In Problems 19-32, find the solution set. y4y3=12Ch. 1.1 - In Problems 19-32, find the solution set. m5335m2Ch. 1.1 - In Problems 19-32, find the solution set. u223u3+2Ch. 1.1 - In Problems 33-36, solve and graph. 23x714Ch. 1.1 - In Problems 33-36, solve and graph. 45x+621Ch. 1.1 - In Problems 33-36, solve and graph. 495C+3268Ch. 1.1 - In Problems 33-36, solve and graph. 123t+511Ch. 1.1 - In Problems 37-42, solve for the indicated...Ch. 1.1 - In Problems 37-42, solve for the indicated...Ch. 1.1 - In Problems 37-42, solve for the indicated...Ch. 1.1 - In Problems 37-42, solve for the indicated...Ch. 1.1 - In Problems 37-42, solve for the indicated...Ch. 1.1 - In Problems 37-42, solve for the indicated...Ch. 1.1 - In Problems 43 and 44, solve and graph. 347x18Ch. 1.1 - In Problems 43 and 44, solve and graph. 1083u6Ch. 1.1 - If both a and b are positive numbers and b/a. is...Ch. 1.1 - If both a and b are negative numbers and b/a is...Ch. 1.1 - Ticket sales. A rock concert brought in $432,500...Ch. 1.1 - Parking meter coins. An all-day parking meter...Ch. 1.1 - IRA. You have $500,000 in an IRA (Individual...Ch. 1.1 - IRA. Refer to Problem 49. How should you divide...Ch. 1.1 - Car prices. If the price change of cars parallels...Ch. 1.1 - Home values. If the price change in houses...Ch. 1.1 - Retail and wholesale prices. Retail prices in a...Ch. 1.1 - Retail and sale prices. Sale prices in a...Ch. 1.1 - Equipment rental. A golf course charges $52 for a...Ch. 1.1 - Equipment rental. The local supermarket rents...Ch. 1.1 - Sales commissions. One employee of a computer...Ch. 1.1 - Sales commissions. A second employee of the...Ch. 1.1 - Break-even analysis. A publisher for a promising...Ch. 1.1 - Break-even analysis. The publisher of a new book...Ch. 1.1 - Break-even analysis. The publisher in Problem 59...Ch. 1.1 - Break-even analysis. The publisher in Problem 60...Ch. 1.1 - Wildlife management. A naturalist estimated the...Ch. 1.1 - Temperature conversion. If the temperature for a...Ch. 1.1 - Psychology. The IQ (intelligence quotient) is...Ch. 1.1 - Psychology. Refer to Problem 65. If the IQ of a...Ch. 1.2 - (A) As noted earlier, (4,3) is a solution of the...Ch. 1.2 - (A) Graph y=x+b for b=5,3,0,3 and 5 simultaneously...Ch. 1.2 - Graph:4x3y=12Ch. 1.2 - Graph 4x-3y=12 on a graphing calculator and find...Ch. 1.2 - (A) Graph x=5andy=3 simultaneously in the same...Ch. 1.2 - Find the slope of the line through each pair of...Ch. 1.2 - Write the equation of the line with slope 12 and y...Ch. 1.2 - (A) Find an equation for the line that has slope...Ch. 1.2 - Answer parts (A) and (B) in Example 7 for fixed...Ch. 1.2 - At a price of $12.59 per box of grapefruit, the...Ch. 1.2 - \ Problems 1-4 refer to graphs (A)-(D). Identify...Ch. 1.2 - Problems 1-4 refer to graphs (A)-(D). Identify the...Ch. 1.2 - Problems 1-4 refer to graphs (A)-(D). Identify the...Ch. 1.2 - Problems 1-4 refer to graphs (A)-(D). Identify the...Ch. 1.2 - In Problems 5-8, sketch a graph of each equation...Ch. 1.2 - In Problems 5-8, sketch a graph of each equation...Ch. 1.2 - In Problems 5-8, sketch a graph of each equation...Ch. 1.2 - In Problems 5-8, sketch a graph of each equation...Ch. 1.2 - In Problems 9-14, find the slope and y intercept...Ch. 1.2 - In Problems 9-14, find the slope and y intercept...Ch. 1.2 - In Problems 9-14, find the slope and y intercept...Ch. 1.2 - In Problems 9-14, find the slope and y intercept...Ch. 1.2 - In Problems 9-14, find the slope and y intercept...Ch. 1.2 - In Problems 9-14, find the slope and y intercept...Ch. 1.2 - In Problems 15-20, find the slope and x intercept...Ch. 1.2 - In Problems 15-20, find the slope and x intercept...Ch. 1.2 - In Problems 15-20, find the slope and x intercept...Ch. 1.2 - In Problems 15-20, find the slope and x intercept...Ch. 1.2 - In Problems 15-20, find the slope and x intercept...Ch. 1.2 - In Problems 15-20, find the slope and x intercept...Ch. 1.2 - In Problems 21-24, write an equation of the line...Ch. 1.2 - In Problems 21-24, write an equation of the line...Ch. 1.2 - In Problems 21-24, write an equation of the line...Ch. 1.2 - In Problems 21-24, write an equation of the line...Ch. 1.2 - In Problems 25-28, use the graph of each line to...Ch. 1.2 - In Problems 25-28, use the graph of each line to...Ch. 1.2 - In Problems 25-28, use the graph of each line to...Ch. 1.2 - In Problems 25-28, use the graph of each line to...Ch. 1.2 - In Problems 29-34, sketch a graph of each equation...Ch. 1.2 - In Problems 29-34, sketch a graph of each equation...Ch. 1.2 - In Problems 29-34, sketch a graph of each equation...Ch. 1.2 - In Problems 29-34, sketch a graph of each equation...Ch. 1.2 - In Problems 29-34, sketch a graph of each equation...Ch. 1.2 - In Problems 29-34, sketch a graph of each equation...Ch. 1.2 - In Problems 35-40, find the slope of the graph of...Ch. 1.2 - In Problems 35-40, find the slope of the graph of...Ch. 1.2 - In Problems 35-40, find the slope of the graph of...Ch. 1.2 - In Problems 35-40, find the slope of the graph of...Ch. 1.2 - In Problems 35-40, find the slope of the graph of...Ch. 1.2 - In Problems 35-40, find the slope of the graph of...Ch. 1.2 - Given Ax+By=12, graph each of the following three...Ch. 1.2 - Given Ax+By=24, graph each of the following three...Ch. 1.2 - Graph y=25x+200,x0.Ch. 1.2 - Graph y=40x+160,x0.Ch. 1.2 - (A) Graph y=1.2x4.2 in a rectangular coordinate...Ch. 1.2 - (A) Graph y=0.8x+5.2 in a rectangular coordinate...Ch. 1.2 - In Problems 47-50, write the equations of the...Ch. 1.2 - In Problems 47-50, write the equations of the...Ch. 1.2 - In Problems 47-50, write the equations of the...Ch. 1.2 - In Problems 47-50, write the equations of the...Ch. 1.2 - In Problems 51-58, write the slope-intercept form...Ch. 1.2 - In Problems 51-58, write the slope-intercept form...Ch. 1.2 - In Problems 51-58, write the slope-intercept form...Ch. 1.2 - In Problems 51-58, write the slope-intercept form...Ch. 1.2 - In Problems 51-58, write the slope-intercept form...Ch. 1.2 - In Problems 51-58, write the slope-intercept form...Ch. 1.2 - In Problems 51-58, write the slope-intercept form...Ch. 1.2 - In Problems 51-58, write the slope-intercept form...Ch. 1.2 - In Problems 59-66, (A) Find the slope of the line...Ch. 1.2 - In Problems 59-66, (A) Find the slope of the line...Ch. 1.2 - In Problems 59-66, (A) Find the slope of the line...Ch. 1.2 - In Problems 59-66, (A) Find the slope of the line...Ch. 1.2 - In Problems 59-66, (A) Find the slope of the line...Ch. 1.2 - In Problems 59-66, (A) Find the slope of the line...Ch. 1.2 - In Problems 59-66, (A) Find the slope of the line...Ch. 1.2 - In Problems 59-66, (A) Find the slope of the line...Ch. 1.2 - Discuss the relationship among the graphs of the...Ch. 1.2 - Discuss the relationship among the graphs of the...Ch. 1.2 - Cost analysis. A donut shop has a fixed cost of...Ch. 1.2 - Cost analysis. A small company manufactures picnic...Ch. 1.2 - Cost analysis. A plant can manufacture 80 golf...Ch. 1.2 - Cost analysis. A plant can manufacture 50 tennis...Ch. 1.2 - Business-Markup policy. A drugstore sells a drug...Ch. 1.2 - Business-Markup policy. A clothing store sells a...Ch. 1.2 - Business-Depreciation. A farmer buys a new tractor...Ch. 1.2 - Business-Depreciation. A charter fishing company...Ch. 1.2 - Boiling point. The temperature at which water...Ch. 1.2 - Boiling point. The temperature at which water...Ch. 1.2 - Flight conditions. In stable air, the air...Ch. 1.2 - Flight navigation. The airspeed indicator on some...Ch. 1.2 - Demographics. The average number of persons per...Ch. 1.2 - Demographics. The median household income divides...Ch. 1.2 - Cigarette smoking. The percentage of female...Ch. 1.2 - Cigarette smoking. The percentage of male...Ch. 1.2 - Supply and demand. At a price of $9.00 per bushel,...Ch. 1.2 - Supply and demand. At a price of $3.20 per bushel,...Ch. 1.2 - Physics. Hooke’s law states that the relationship...Ch. 1.2 - Physics. The distance d between a fixed spring and...Ch. 1.3 - As illustrated in Example 1A, the slope m of a...Ch. 1.3 - As stated previously, we used linear regression to...Ch. 1.3 - The equation a=28.55w+118.7 expresses BSA for...Ch. 1.3 - A 400-pound load of grain is dropped from an...Ch. 1.3 - Prices for emerald-shaped diamonds from an online...Ch. 1.3 - Using the model of Example 4, estimate the...Ch. 1.3 - Figure 5 shows the scatter plot for white spruce...Ch. 1.3 - Ideal weight. Dr. J. D. Robinson published the...Ch. 1.3 - Ideal weight. Dr. J. D. Robinson also published...Ch. 1.3 - Underwater pressure. At sea level, the weight of...Ch. 1.3 - Underwater pressure. Refer to Problem 3. In fresh...Ch. 1.3 - Rate of descent Parachutes. At low altitudes, the...Ch. 1.3 - Rate of descent Parachutes. The U.S Army is...Ch. 1.3 - Speed of sound. The speed of sound through air is...Ch. 1.3 - Speed of sound. The speed of sound through sea...Ch. 1.3 - Energy production. Table 5 lists U.S. fossil fuel...Ch. 1.3 - Energy consumption. Table 6 lists U.S. fossil fuel...Ch. 1.3 - Cigarette smoking. The data in Table 7 shows that...Ch. 1.3 - Cigarette smoking. The data in Table 7 shows that...Ch. 1.3 - Licensed drivers. Table 8 contains the state...Ch. 1.3 - Licensed drivers. Table 9 contains the state...Ch. 1.3 - Net sales. A linear regression model for the net...Ch. 1.3 - Operating income. A linear regression model for...Ch. 1.3 - Freezing temperature. Ethylene glycol and...Ch. 1.3 - Freezing temperature. A linear regression model...Ch. 1.3 - Forestry. The figure contains a scatter plot of...Ch. 1.3 - Forestry. The figure contains a scatter plot of...Ch. 1.3 - Undergraduate enrollment. Table 12 lists fall...Ch. 1.3 - Graduate enrollment. Table 13 lists fall graduate...Ch. 1.3 - Climate. Find a linear regression model for the...Ch. 1.3 - Climate. Find a linear regression model for the...Ch. 1.3 - Olympic Games. Find a linear regression model for...Ch. 1.3 - Olympic Games. Find a linear regression model for...Ch. 1.3 - Supply and demand. Table 16 contains price supply...Ch. 1.3 - Supply and demand. Table 17 contains price supply...Ch. 1 - Solve2x+3=7x11.Ch. 1 - Solvex12x33=12.Ch. 1 - Solve2x+5y=9fory.Ch. 1 - Solve3x4y=7forx.Ch. 1 - Solve Problems 5-7 and graph on a real number...Ch. 1 - Solve Problems 5-7 and graph on a real number...Ch. 1 - Solve Problems 5-7 and graph on a real number...Ch. 1 - Sketch a graph of 3x+2y=9.Ch. 1 - Write an equation of a line with x intercept 6 and...Ch. 1 - Sketch a graph of 2x3y=18. What are the intercepts...Ch. 1 - Write an equation in the form y=mx+b for a line...Ch. 1 - Write the equations of the vertical line and the...Ch. 1 - Write the equation of a line through each...Ch. 1 - Write the equation of the line through the two...Ch. 1 - Solve Problems 15-19. 3x+25=5xCh. 1 - Solve Problems 15-19. u5=u6+65Ch. 1 - Solve Problems 15-19. 5x34+x2=x24+1Ch. 1 - Solve Problems 15-19. 0.05x+0.2530x=3.3Ch. 1 - Solve Problems 15-19. 0.2x3+0.05x=0.4Ch. 1 - Solve Problems 20-24 and graph on a real number...Ch. 1 - Solve Problems 20-24 and graph on a real number...Ch. 1 - Solve Problems 20-24 and graph on a real number...Ch. 1 - Solve Problems 20-24 and graph on a real number...Ch. 1 - Solve Problems 20-24 and graph on a real number...Ch. 1 - Given Ax+By=30, graph each of the following cases...Ch. 1 - Describe the graphs of x=3 and y=2 Graph both...Ch. 1 - Describe the lines defined by the following...Ch. 1 - Solve Problems 28 and 29 for the indicated...Ch. 1 - Solve Problems 28 and 29 for the indicated...Ch. 1 - For what values of a and b is the inequality a+bba...Ch. 1 - If a and b are negative numbers and ab, then is...Ch. 1 - Graph y=mx+bandy=1mx+b simultaneously in the same...Ch. 1 - Investing. An investor has $300,000 to invest. If...Ch. 1 - Break-even analysis. A producer of educational...Ch. 1 - Sports medicine. A simple rule of thumb for...Ch. 1 - Linear depreciation. A bulldozer was purchased by...Ch. 1 - Business Pricing. A sporting goods store sells...Ch. 1 - Income. A salesperson receives a base salary of...Ch. 1 - Price demand. The weekly demand for mouthwash in a...Ch. 1 - Freezing temperature. Methanol, also known as wood...Ch. 1 - High school dropout rates. Table 2 gives U.S. high...Ch. 1 - Consumer Price Index. The U.S. Consumer Price...Ch. 1 - Forestry. The figure contains a scatter plot of 20...
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