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business
business statistics communicating
Questions and Answers of
Business Statistics Communicating
The file German Coffee contains data on individual coffee consumption (in kg) for 144 randomly selected German coffee drinkers.a. Construct a data array of the coffee consumption data.b. Construct a
The following data reflect the percentages of employees with different levels of education:Education Level Percentage Less than high school graduate 18 High school graduate 34 Some college 14 College
Given the following data, construct a stem and leaf diagram:0.7 1.7 2.8 3.8 0.8 1.8 3.3 4.3 1.0 2.0 4.4 5.4 1.1 2.1 5.3 6.3 1.4 2.4 5.4 6.4 2.0 3.0
Given the following sales data for product category and sales region, construct at least two different bar charts that display the data effectively:Region East West North South XJ-6 Model 200 300 50
The 2007 Annual Report of Murphy Oil Corporation contains the following information concerning the number of barrels of product sold per day by product category for North America and the United
Boston Properties is a real estate investment trust(REIT) that owns first-class office properties in selected markets. According to its 2007 annual report, its income distribution by region (in
Hileman Services Company recently released the following data concerning its operating profits (in$billions) for the last five years:Year 2004 2005 2006 2007 2008 Profit 0.5 0.1 0.7 0.5 0.2a.
DaimlerChrysler recently sold its Chrysler division to a private equity firm. Before the sale it reported its firsthalf revenues (in $billions) as follows:Division Mercedes Chrysler Commercial
The pharmaceutical industry is a very fast-growing segment of the U.S. and international economies.Recently, there has been controversy over how studies are done to show that drugs are both safe and
The number of branded retail outlets for Murphy Oil Corporation as of December 31 of each year from 2001 to 2007 are shown below (Source: 2007 Annual Report of Murphy Oil Corporation).Branded Retail
The 2008 Annual Report of the Procter & Gamble Company reports the following net sales information by global segment:Global Segment 2008 Net Sales ($Millions)Beauty 19,515 Grooming 8,254 Health Care
A fast-food restaurant monitors its drive-thru service times electronically to ensure that its speed of service is meeting the company’s goals. A sample of 28 drive-thru times was recently taken
A random sample of 30 customer records for a physician’s office showed the following time (in days)to collect insurance payments:Number of Days to Collect Payment 34 55 36 39 36 32 35 30 47 31 60
USA Today presented data (Marilyn Adams and Dan Reed, “Difficult Times Battered Airlines,” September 16, 2005) to show that major airlines accounting for more than half of capacity were expected
Many of the world’s most successful companies rely on The NPD Group to provide global sales and marketing information that helps clients make more informed, fact-based decisions to optimize their
The following data represent 11 observations of two quantitative variables:x contact hours with client, y profit generated from client.x y x y x y x y 45 2,345 54 3,811 34 700 24 1,975 56 4,200
You have the following sales data for the past 12 months. Develop a line graph for these data.Month Jan Feb Mar Apr May Jun Sales 200 230 210 300 320 290 Month Jul Aug Sep Oct Nov Dec Sales 300 360
The following data represent 11 observations of two quantitative variables:x contact hours with client, y profit generated from client.
You have the following sales data for the past 12 months. Develop a line graph for these data.Month Jan Feb Mar Apr May Jun Sales 200 230 210 300 320 290 Month Jul Aug Sep Oct Nov Dec Sales 300 360
The following data have been selected for two variables, y and x. Construct a scatter plot for these two variables and indicate what type, if any, relationship appears to be present.y x 100 23.5 250
The following information shows the year-end dollar value (in millions) of deposits for Bank of the Ozarks, Inc., for the years 1997–2007.Year Deposits (in $Millions)1997 296 1998 529 1999 596 2000
VanAuker Properties’ controller collected the following data on annual sales and the years of experience of members of his sales staff:Sales $K: 200 191 135 236 305 183 50 192 184 73 Years: 10 4 5
Amazon.com celebrated its 13th anniversary in July 2007. Its growth can be seen by examining its increasing sales volume (in $billions) as reported by Hoovers Inc.Sales 0.0005 0.0157 0.1477 0.6098
Recent changes in the U.S. federal tax code have increased the popularity of dividend-paying stocks for some investors. Shown here are the diluted net earnings per common share and the dividends per
Business Week (Reed, Stanley, et al., “Open Season on Big Oil,” September 26, 2005) reported on data provided by A. G. Edwards & Sons concerning the profits ($billions) for 10 of the largest
Japolli Bakery tracks sales of its different bread products on a daily basis. The data at the top of the next page show sales for 22 consecutive days at one of its retail outlets in Nashville.
What are the characteristics of a data set that would lead you to construct a bar chart?
USA Today reported (Anthony Breznican and Gary Strauss, “Where Have All the Moviegoers Gone?” June 23, 2005) that in the summer of 2005 ticket sales to movie theaters had fallen for 17 straight
The following data represent the commuting distances for employees of the Pay-and-Carry Department store.a. The personnel manager for Pay-and-Carry would like you to develop a frequency distribution
Anyone attending college realizes tuition costs have increased rapidly. In fact, tuition had risen at a faster pace than inflation for more than two decades. Data showing costs for both private and
A recent article in USA Today used the following data to illustrate the decline in the percentage of men who receive college and advanced degrees:Bachelor Doctorate 1989 2003 2014* 1989 2003 2014*Men
The regional sales manager for American Toys, Inc., recently collected data on weekly sales (in dollars) for the 15 stores in his region. He also collected data on the number of salesclerk work hours
The Energy Information Administration (EIA) surveys the price of diesel fuel. The EIA-888 is a survey of diesel fuel outlet prices from truck stops and service.a. the total time from arrival on the
You are given the following sample data:Group 1 Group 2 Group 3 21 17 29 25 15 38 36 34 28 35 22 27 33 16 14 23 19 26 31 30 39 32 20 36a. State the appropriate null and alternative hypotheses to test
J.A. Hersh and Company provides court transcription services. The company is considering two keyboard styles for its staff to use in court. One factor that will influence its decision is the ease of
When a new home-use digital blood pressure monitor is developed it needs to be tested for accuracy. One such test is to have a physician first determine the blood pressure of a randomly sampled group
An intern for the California Transportation Department conducted a study on a stretch of interstate highway south of San Francisco to determine whether the mean speed for California vehicles exceeded
There has been a debate over whether children who are placed in child-care facilities while their parents work suffer as a result. A New York Times article suggests that this might not be the case
The Montgomery Athletic Shoe Company has developed a new shoe-sole material it thinks provides superior wear compared with the old material the company has been using for its running shoes. The
Radio advertisements have been stressing the virtues of an online audio program to help children learn to read.To test whether this program can cause a quick improvement in reading ability, suppose
A cattle feedlot operator has collected data for 40 matched pairs of cattle showing weight gain on two different feed supplements. His purpose in collecting the data is to determine whether there is
Suppose a state tax commission conducted a study to determine whether there is a difference in median deductions taken for charitable contributions depending on whether a tax return is filed as a
Steven just registered to an undergraduate business program and he managed to get the first-year booklist for his study program. For the purpose of saving money, he plans to find out whether online
The makers of a new mobile theater system that is vision correctable so there is no need to wear glasses while using the device have done a marketing research study in which they asked two
National Reading Academy claims that graduates of its program have a higher median reading speed per minute than people who do not take the course.Suppose an independent agency conducted a study to
Consider the following data for two paired samples:Case Sample 1 Sample 2 1 258 304 2 197 190 3 400 500 4 350 340 5 237 250 6 400 358 7 370 390 8 130 100a. Test the following null and alternative
You are given two paired samples with the following information:Item Sample 1 Sample 2 1 234 245 2 221 224 3 196 194 4 245 267 5 234 230 6 204 198 Based on these paired samples, test at the a = 0.05
From a recent study we have collected the following data from two independent random samples:Sample 1 Sample 2 405 300 450 340 290 400 370 250 345 270 460 410 425 435 275 390 380 225 330 210 500 395
You are given two paired samples with the following information:Item Sample 1 Sample 2 1 1,004 1,045 2 1,245 1,145 3 1,360 1,400 4 1,150 1,000 5 1,300 1,350 6 1,450 1,350 7 900 1,140 Based on these
You are given two paired samples with the following information:Item Sample 1 Sample 2 1 19.6 21.3 2 22.1 17.4 3 19.5 19.0 4 20.0 21.2 Item Sample 1 Sample 2 5 21.5 20.1 6 20.2 23.5 7 17.9 18.9 8
You are given two paired samples with the following information:Item Sample 1 Sample 2 1 3.4 2.8 2 2.5 3.0 3 7.0 5.5 4 5.9 6.7 5 4.0 3.5 6 5.0 5.0 7 6.2 7.5 8 5.3 4.2a. Based on these paired samples,
For each of the following tests, determine which of the two sums of absolute ranks (negative or positive) you would choose, the appropriate test statistic, and the rejection region for the Wilcoxon
The following sample data have been collected from independent samples from two populations. Do the populations have different medians? Test at a significance level of 0.05. Use the Mann–Whitney
Determine the rejection region for the Mann–Whitney U-test in each of the following cases:a. HA: m 1 6 m 2, a = 0.05, n1 = 3, and n2 = 15b. HA: m 1 m 2, a = 0.10, n1 = 5, and n2 = 20c.
The following sample data have been collected from two independent random samples from two populations. Test the claim that the first population median will exceed the median of the second
The following sample data have been collected from independent samples from two populations. The claim is that the first population median will be larger than the median of the second
The following sample data have been collected from two independent samples from two populations. Test the claim that the second population median will exceed the median of the first population.Sample
For each of the following tests, determine which of the two U statistics 1U1 or U22 you would choose, the appropriate test statistic, and the rejection region for the Mann–Whitney test:a. HA: m 1
The Wilson Company uses a great deal of water in the process of making industrial milling equipment. To determine whether the company is complying with federal clean water laws, sample measures are
The marketing manager of a cell phone company is working on an advertising plan that is to be directed toward a young audience. In conjunction with the plan, the manager states that the median age of
Suppose an engine oil manufacturer wants to verify the viscosity of its premium 30-weight oil. A simple random sample of specimens taken from automobiles running at normal temperatures was obtained.
Fillmore, Inc.’s quality-control division is constantly monitoring various parameters related to its products.One investigation addressed the life of incandescent light bulbs (in hours). Initially,
A company that packages salted peanuts has stated that each package weighs 11 ounces. However, the company has received complaints that the packages are underweight. To assess this situation, suppose
The human resources manager at an insurance company has stated that during their initial 6-month period of employment, new sales personnel spent a median of 119 hours per month in training. A random
A cable television customer call center has a goal that the median time for each completed call should not exceed four minutes. The operations manager does not want to incorrectly conclude that the
Sigman Corporation makes batteries that are used in highway signals in rural areas. The company managers claim that the median life of a battery exceeds 4,000 hours. To test this claim, they have
Consider the following set of observations:3.1 4.8 2.3 5.6 2.8 2.9 4.4 You should not assume these data come from a normal distribution. Test the hypothesis that these data come from a distribution
Consider the following set of observations:10.21 13.65 12.30 9.51 11.32 12.77 6.16 8.55 11.78 12.32 You should not assume these data come from a normal distribution. Test the hypothesis that these
Consider the following set of observations:9.0 15.6 21.1 11.1 13.5 9.2 13.6 15.8 12.5 18.7 18.9 You should not assume these data come from a normal distribution. Test the hypothesis that the median
The file Quarterly Shipments lists the number of units shipped each quarter for the years 2011–2015 by Bourff Manufacturing.a. Produce a time-series graph of the data. Are there noticeable trend
The file Phone Expenses contains the monthly telephone expenses for a small business.a. Produce a time-series graph of the data. Can you identify a trend or seasonal component?b. Using the Excel 2016
Referring to Exercise 16-61, the managers at Armstead & Associates need to forecast monthly call volumes in order to have sufficient capacity. Develop a single exponential smoothing model using a =
The data file Armstead contains the monthly number of calls received by Armstead & Associates, a company that was formed to help individuals locate long-term health care assistance for elderly
Freddie Mac is an organization that was formed by the U.S. Congress in 1970 to help maintain mortgage interest rates at a fairly stable level. The data in the file Mortgage Rates show the 30-year
Suppose the median weekly earnings for recent college graduates in a large city by quarter for the years 2008 to 2015 are as follows:Quarter Median Weekly Earnings Quarter Median Weekly Earnings Qtr
Tom and Hank’s is a regional convenience store with locations in several small towns along the Mississippi River. The quarterly revenues for the store beginning with the first quarter of 2005 and
Loans and leases data for the years 2005 through 2015 for Glen Lake Bank are shown below:Year Loans & Leases ($ millions)2005 511 2006 616 2007 718 2008 909 2009 1,135 2010 1,371 2011 1,677 2012
A pizza outlet has tracked the total number of super deluxe pizzas sold in each of the past six years. The data are as follows:Year 2011 2012 2013 2014 2015 2016 Sales 2,074 2,395 3,138 3,632 4,694
Below are income and sales data for a company for the years 2003 through 2015.Year Net Income/Loss Sales 2003 - 0.3 0.5 2004 - 5.7 15.7 2005 - 27.5 147.7 2006 - 124.5 609.8 2007 - 719.9 1,639.8 2008
Using whatever diagnostic tools you are familiar with, determine which of the three forecasting methods utilized to forecast sales for Malcar Autoparts Company in the previous three exercises
Develop a double exponential smoothing model using smoothing constants a = 0.20 and b = 0.40. As starting values, use the least squares trend line slope and intercept values.a. Compute the MAD for
Develop a single exponential smoothing model using a = 0.20. Use as a starting value the average of the first 6 years’ data. Determine the forecasted value for year 2016.a. Compute the MAD for this
a. Graph these data and indicate whether they appear to have a linear trend.b. Develop a simple linear regression model with time as the independent variable. Using this regression model, describe
Identify the businesses in your community that you expect to have sales that exhibit a seasonal component.Discuss.
Go to the library or use the Internet to find data showing your state’s population for the past 20 years. Plot these data and indicate which of the time-series components are present.
Discuss which model is preferred.d. Referring to partb, try different alpha and beta values in an attempt to determine an improved forecast model for monthly sales. For each model, show the forecast
The sales manager at Grossmieller Importers in New York City needs to determine a monthly forecast for the number of men’s golf shirts that will be sold so that he can order an appropriate number
The file Museum Visitors contains the number of visitors to a city museum each day during the period January 3 to March 20, 2015.a. Use the data and the Excel 2016 Forecast Sheet option to develop a
Harrison Avenue Burgers is a fast-food business that has been open since 1992. Suppose that the owner has monitored the average price he has paid for a pound of hamburger on an annual basis since
An electrical utility in a city in a South American country needs to forecast the highest temperature in the city on any day during a month. The following data reflect the highest recorded
The human resources manager for a medium-sized business is interested in predicting the dollar value of medical expenditures filed by employees of her company for the year 2017. From her company’s
A May 2015 Wall Street Journal article indicated that 2015 college graduates had the highest average student debt ever, at slightly more than $35,000 per student.The following data show the average
With tax revenues declining in many states, school districts have been searching for ways to cut costs without affecting classroom academics. Suppose one district has been looking at the cost of
The following data represent enrollment in a major at your university for the past six semesters. (Note:Semester 1 is the oldest data; semester 6 is the most recent data.)Semester Enrollment 1 87 2
The following table represents two years of data:Year 1 Year 2 1st quarter 242 1st quarter 272 2nd quarter 252 2nd quarter 267 3rd quarter 257 3rd quarter 276 4th quarter 267 4th quarter 281a.
The United States Census Bureau collects and maintains data on a wide range of statistics associated with the U.S. economy. For example, the file Retail Sales contains the total retail sales in
The federal funds rate is the interest rate charged by banks when banks borrow “overnight” from each other.The file titled The Fed contains the federal funds rates for the period 1955 through
Refer to Exercise 16-30.a. Use the linear trend model (without transformation)for the first 15 months and provide a cash balance forecast for month 16. Then make the t2 transformation and develop a
Logan Pickens is a plan/build construction company specializing in resort area construction projects.Suppose that plan/build companies typically have a cash flow problem, since they tend to be paid
The manager of a financial investment office is evaluated based on the number of new clients generated each quarter. The following data reflect the number of new customers added during each quarter
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