Question: Have each student in the class respond

> Thirty companies comprise the DJIA. How big are these companies? One common method for measuring the size of a company is to use its market capitalization, which is computed by multiplying the number of stock shares by the price of a share of stock. On A

> The file Gold contains the price in London for an ounce of gold (in US$) at the end of each quarter from 2004. Source: Data extracted from USAGold, "Daily Gold Price History," bit.ly/2w8iBSl. a. Plot the data. b. Develop an exponential trend forecasting

> The file Silver-Q contains the price in London for an ounce of silver (i n US$) at the end of each quarter from 2004 through 2018. Source: Data extracted from USAGold, "Daily Silver Price History," bit.ly/20BoVuB. a. Plot the data. b. Develop an exponent

> The file Crude Oil contains the volume (in barrels) of Canadian crude oil exports by rail from January 2012 to May 2019. Source: Data extracted from National Energy Board, "Canadian Crude Oil Exports by Rail - Monthly Data," bit.ly/IRJTx6c. a. Plot the t

> Using the bonuses paid to workers on Wall Street data for Problem 16.12 and Problem 16.28 (stored in Bonuses). a. Performs a residual analysis for each model. b. Compute the standard error of the estimate (Syx) for each model. c. Compute the MAD for each

> Referring to the results for Problem 16. 13 that used the file GDP, a. Performs a residual analysis. b. Compute the standard error of the estimate (Srx). c. Compute the MAD. d. On the basis of (a) through (c), are you satisfied with your linear trend for

> Using the data for the number of automobiles assembled in the United States for Problem 16.17 and Problem 16.29 (stored in Auto Production), a. Performs a residual analysis for each model. b. Compute the standard error of the estimate (Srx) for each mode

> Using the data for Problem 16.15 that represent the number of new, single-family houses sold in the United States from 1992 through 2018 (stored in House Sales), a. fit a third-order autoregressive model to the new single-family homes sold and test for t

> Using the yearly amount of solar power generated by utilities (in millions of kWh) in the United States from 2002 through 2018 data for Problem 16.16 (stored in Solar Power), a. fit a third-order autoregressive model to the amount of solar power installe

> Using the average baseball salary from 2000 through 2019 data for Problem 16.18 (stored in MLB Salaries), a. fit a third-order autoregressive model to the average baseball salary and test for the significance of the third-order autoregressive parameter.

> Using the data for Problem 16.17 concerning the number of automobiles assembled in the United States from 1999 to 2018 (stored in Auto Production), a. fit a third-order autoregressive model to the number of automobiles assembled in the United States and

> The Super Bowl is a big viewing event watched by close to 200 million Americans, so it is also a big event for advertisers. The file Super Bowl Ad Rating contains the rating of ads that ran between the opening kick-off and the final whistle. Source: Data

> In a one-way ANOVA, what is the difference between the among-groups variance MSA and the within-groups variance MSW?

> Using the data for Problem 16.12 concerning the bonuses paid to workers on Wall Street from 2000 to 2018 (stored in Bonuses), a. Fit a third-order autoregressive model to the bonuses paid and test for the significance of the third-order autoregressive pa

> Referring to Problem 10.2, if n1 = 5 and n2 = 4, at the 0.01 level of significance, is there evidence that µ1 > µ2? Data from Problem 10.2: Assume that you have a sample of n1 = 8 with the sample mean X1 = 42, and a sample standard deviation S1 = 4, and

> Referring to Problem 10.2, if n1 = 5 and n2 = 4, how many degrees of freedom do you have? Data from Problem 10.2: Assume that you have a sample of n1 = 8 with the sample mean X1 = 42, and a sample standard deviation S1 = 4, and you have an independent s

> Referring to Problem 10.2, construct a 95% confidence interval estimate of the population mean difference between µ1 and µ2. Data from Problem 10.2: Assume that you have a sample of n1 = 8 with the sample mean X1 = 42, and a sample standard deviation S1

> What assumptions about the two populations are necessary in Problem 10.2? Data from Problem 10.2: Assume that you have a sample of n1 = 8 with the sample mean X1 = 42, and a sample standard deviation S1 = 4, and you have an independent sample of n2 = 15

> Assume that you have a sample of n1 = 8 with the sample mean X1 = 42, and a sample standard deviation S1 = 4, and you have an independent sample of n2 = 15 from another population with a sample mean of X2 = 34 and a sample standard deviation S2 = 5. a. W

> How will marketers change their organic (unpaid) social media postings in the near future? A survey by Social Media Examiner reported that 65% ofB2B marketers (marketers who focus primarily on attracting businesses) plan to increase LinkedIn organic soci

> A box of nine iPhone 7 cell phones contains two red cell phones and seven black cell phones. a. If two cell phones are randomly selected from the box, without replacement (the first cell phone is not returned to the box after it is selected), what is the

> Financial experts say retirement accounts are one of the best tools for saving and investing for the future. Are millennials and Gen Xers financially prepared for the future? A survey of American adults conducted by INSIDER and Morning Consult revealed t

> In 2017, the per capita consumption of soft drinks in the United States was reported to be 37.5 gallons. Source: Data extracted from Shop Tutors, Inc., bit.ly/2S4xWzg. Assume that the per capita consumption of soft drinks in the United States is approxim

> Suppose that 1,000 customers in an online electronics seller's customer database are categorized by three customer types: 200 potential customers who have visited the site but not purchased, 300 who have purchased once, and 200 repeat (loyal) buyers. A s

> If P(A) = 0.7, P(B) = 0.6, and A and Bare independent, find P (A and B).

> Consumers are aware that companies share and sell their personal data in exchange for free services, but is it important to consumers to have a clear understanding of a company's privacy policy before signing up for its service online? According to an Ax

> Is there full support for increased use of educational technologies in higher ed? As part of Inside Higher Ed's 2018 Survey of Faculty Attitudes on Technology, academic professionals, namely, full-time faculty members and administrators who oversee their

> Are small and mid-sized business (SMB) owners concerned about limited access to money affecting their businesses? A sample of 150 female SMB owners and 146 male SMB owners revealed the following results: a. If a SMB owner selected is female, what is the

> A time-series plot often helps you determine the appropriate model to use. For this problem, use each of the time series presented in the following table and stored in Time Series B. a. Plot the observed data Y over time X and plot the logarithm of the o

> Although you should not expect a perfectly fitting model for any time-series data, you can consider the first differences, second differences, and percentage differences for a given series as guides in choosing an appropriate model. For this problem, use

> The data in CPI-U reflect the annual values of the consumer price index for all urban consumers (CPI-U) in the United States over the 54-year period 1965 through 2018, using 1982 through 1986 as the base period. This index measures the average change in

> The file Silver contains the following prices in London for an ounce of silver (in US$) on the last day of the year from 1999 to 2018: a. Plot the data. b. Compute a linear trend forecasting equation and plot the trend line. c. Compute a quadratic trend

> In 2017, the per capita consumption of bottled water in China was reported to be 25.46 gallons. Source: Data extracted from IBWA, "Bottled Water Market," bit.ly/2Jlmynt. Assume that the per capita consumption of bottled water in China is approximately no

> The average salary of Major League Baseball players on opening day from 2000 to 2019 is stored in MLB Salaries and in the following table. a. Plot the data. b. Compute a linear trend forecasting equation and plot the trend line. c. Compute a quadratic tr

> The file Auto Production contains the number of automobiles assembled in the United States (in thousands) from 1999 to 2018. Source: Data extracted from FRED, "Domestic Auto Production," bit.ly/2KH.KCpz. a. Plot the data. b. Compute a linear trend foreca

> What are the two main approaches in prescriptive analytics?

> The data shown in the following tab le and stored in Solar Power represent the yearly amount of solar power generated by utilities (in millions of kWh) in the United States from 2002 through 2018: a. Plot the data. b. Compute a linear trend forecasting e

> The data in Federal Receipts represent federal receipts from 1978 through 2018 in billions of current dollars, from individual and corporate income tax, social insurance, excise tax, estate and gift tax, customs duties, and federal reserve deposits. Sour

> Gross domestic product (GDP) is a major indicator of a nation's overall economic activity. It consists of personal consumption expenditures, gross domestic investment, net exports of goods and services, and government consumption expenditures. The file G

> The Super Bowl is a big viewing event watched by close to 200 million Americans, so it is also a big event for advertisers. The file Super Bowl Ad Rating contains the rating of ads that ran between the opening kickoff and the final whistle. Source: Data

> The following data, stored in Core Appliances, list the number of shipments of core major household appliances in the United States from 2000 to 2017 (in millions). a. Plot the time series. b. Fit a three-year moving average to the data and plot the resu

> The data below, stored in Computer Usage, represent the hours per day spent by American desktop and laptop users from 2008 to 2017. a. Plot the time series. b. Fit a three-year moving average to the data and plot the results. c. Using a smoothing coeffic

> The file Travel and Tourism contains 2018 travel and tourism industry data for a sample of 28 European countries. Variables included are travel and tourism jobs (in thousands), nights spent by European residents at tourism establishments (in millions), e

> The American Community Survey (www.census.gov/acs) provides data every year about communities in the United States. Addresses are randomly selected, and respondents are required to supply answers to a series of questions. a. Which of the sources of data

> The following table contains the probability distribution for the number of traffic accidents per day in a small town: a. Calculate the mean number of accidents per day. b. Calculate the standard deviation. c. What is the probability that there will be a

> Referring to the results from Problem 2.100 concerning the weights of Boston and Vermont shingles, write a report that evaluates whether the weights of the pallets of the two types of shingles are what the company expects. Be sure to incorporate tables a

> Cross-classify each student in the class by gender (male, female) and current employment status (yes, no) so that the instructor can tally the results. a. Construct a table with either row or column percentages, depending on which you think is more infor

> How much time per week are employees willing to devote to improve their overall health and well-being by pursuing activities such as consistent exercise, researching healthy recipes, or engaging in wellness coaching? A study by UnitedHealthcare revealed

> The file Natural Gas contains the U.S. monthly average commercial and residential price for natural gas in dollars per thousand cubic feet from January 2008 through December 2018. Source: Data extracted from "U.S. Natural Gas Prices," eia.org, March 30,

> College basketball in the United States is big business with television contracts in the billions of dollars and coaches' salaries in the millions of dollars. The file Coaches Pay contains the total pay for coaches for a recent year and whether the schoo

> Download speed of an Internet connection is of great importance to both individuals and businesses in a community. The file City Download Speeds contains the download speed in Mbps for 100 United States cities with the fastest download speeds. Source: Da

> The file CD Rates contains the yields for one-year certificates of deposit (CDs) and for five-year CDs for 46 financial institutions selling CDs in Lake Worth, Florida, as of April 5, 2019. Source: Data extracted and compiled from www.bankrate.com, April

> The Super Bowl, watched by close to 200 million Americans, is also a big event for advertisers. The file contains the rating of ads that ran between the opening kick-off and the final whistle. Source: Data extracted from www.admeter.usatoday.com/results/

> Using the data of Problem 15.6, stored in Honda Prices perform a natural logarithm transformation of the dependent variable (price). Using the transformed dependent variable and the age as the independent variable, perform a regression analysis. a. State

> The file Domestic Beer contains the percentage alcohol, number of calories per 12 ounces, and number of carbohydrates (in grams) per 12 ounces for 157 of the bestselling domestic beers in the United States. Source: Data extracted from www.beer100.com/bee

> The Air Travel Consumer Report, a monthly product of the Department of Transportation's Office of Aviation Enforcement and Proceedings (OAEP), is designed to assist consumers with information on the quality of services provided by airlines. The report in

> B2B marketers in North America were surveyed about content marketing usage, organization, and success. Content marketers were asked about how content marketing is structured within their organization and how they would describe their organization's commi

> The following table stored in Movie Types represents the market share (in number of movies, gross in millions of dollars, and millions of tickets sold) of each type of movie in 2018: a. Construct a bar chart, a pie chart, a doughnut chart, and a Pareto c

> How does clustering differ from association analysis?

> Referring to the results of Problems 9.76 through 9.78 concerning Boston and Vermont shingles, write a report that evaluates the moisture level, weight, and granule loss of the two types of shingles. Data from Problem 9.76: An important quality characte

> Teachers' Retirement System of the City of New York offers several types of investments for its members. Among the choices are investments with fixed and variable rates of return. There are several categories of variable-return investments. The Diversifi

> The file McDonalds contains the gross revenues (in billions of current dollars) of McDonald's Corporation from 1975 through 2018: a. Plot the data. b. Compute the linear trend forecasting equation. c. Compute the quadratic trend forecasting equation. d.

> The U.S. Department of Labor gathers and publishes statistics concerning the tabor market. The file Workforce contains the size of the U.S. civilian non institutional population of people 16 years and over (in thousands) and the U.S. civilian non institu

> A market researcher for a consumer electronics company wants to study the media viewing behaviour of residents of a particular area. A random sample of 40 respondents is selected, and each respondent is instructed to keep a detailed record of time spent

> Is there full support for increased use of educational technologies in higher ed? As part of Inside Higher Ed's 2018 Survey of Faculty Attitudes on Technology, academic professionals, namely, full-time faculty members and administrators who oversee their

> The file Domestic Beer contains the percentage alcohol, number of calories per 12 ounces, and number of carbohydrates (in grams) per 12 ounces for 157 of the best-selling domestic beers in the United States. Source: Data extracted from bit.ly/IA4E6AF, Ap

> A 2019 PwC survey of l,000 U.S. executives indicated that artificial intelligence (Al) is no longer seen as a side project. Eighty percent of U.S. CEOs think AI will significantly change the way they will do business in the next five years. At the same t

> Refer to the room service experiment in Problem 11.40. Now suppose that the results are as shown below and stored in Breakfast Results. Repeat (a) through (e), using these data, and compare the results to those of (a) through (e) of Problem 11.40. Data

> How much time do commuters living in or near cities spend commuting to work each week? The file Commuting Time contains the average weekly commuting time in 30 U.S. cities. Source: Data extracted from factfinder.census.gov. For the weekly commuting time

> Suppose that, when setting up the experiment in Problem 11.38, the operations manager is able to study the effect of side-to-side aspect in addition to air-jet pressure. Thus, instead of the one-factor completely randomized design in Problem 11.38, a two

> In 2016 through 2018, the value of precious metals fluctuated greatly. The data (stored in Metals) represent the total rate of return (in percentage) for platinum, gold, and silver from 2016 through 2018: a. Compute the geometric mean rate of return per

> Medical wires are used in the manufacture of cardiovascular devices. A study was conducted to determine the effect of several factors on the ratio of the load on a test specimen (YS) to the ultimate tensile strength (UTS). The file Medical Wires 1 contai

> Webrooming, researching products online before buying them in store, has become the new norm for some consumers and contrasts with showrooming, researching products in a physical store before purchasing online. A recent study by Interactions reported tha

> College basketball in the United States is big business with television contracts in the billions of dollars and coaches' salaries in the millions of dollars. The file Coaches Pay contains the total coaches pay for a recent year and whether the school wa

> Deanna Oxender Burgess of Florida Gulf Coast University conducted research about corporate annual reports (see D. Rosato, "Worried About Corporate Numbers? How About the Charts?" nyti.ms/2Ged1Qu). Burgess found that even slight distortions in a chart cha

> Using the data of Problem 15.4, stored in Domestic Beer, perform a natural logarithmic transformation of the dependent variable (calories). Using the transformed dependent variable and the percentage of alcohol and the number of carbohydrates as the inde

> Bring to class a chart from a website, newspaper, or magazine published recently that you believe to be a poorly drawn representation of a numerical variable. Be prepared to submit the chart to the instructor with comments about why you believe it is ina

> One theory about the daily changes in the closing price of a stock is that these changes follow a random walk-that is, these daily events are independent of each other and move upward or downward in a random manner-and can be approximated by a normal dis

> Bring to class a chart from a website, newspaper, or magazine published this month that you believe to be a poorly drawn representation of a categorical variable. Be prepared to submit the chart to the instructor with comments about why you consider it i

> In hypothesis testing, the common level of significance is α = 0.05. Some might argue for a level of significance greater than 0.05. Suppose that web designers tested the proportion of potential web page visitors with a preference for a new web design ov

> Referring to the results in Problem 8.66 concerning the answer time of calls, write a report that summarizes your conclusions. Data from Problem 8.66: Call centres today play an important role in managing day-to-day business communications with customer

> The file Indices contains data that represent the total rate of return percentage for the Dow Jones Industrial Average (DJIA), the Standard & Poor's 500 (S&P 500), and the technology-heavy NASDAQ Composite (NASDAQ) from 2015 through 2018. a. Compute the

> Consider the following contingency table: What is the probability of event; a. A? b. A'? c. A and B? d. A or B?

> One of the major measures of the quality of service provided by an organization is the speed with which it responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a major expan

> The monthly commercial and residential prices for natural gas (dollars per thousand cubic feet) in the United States from January 2008 through May are stored in Natural Gas. Source: Data extracted from Energy Information Administration, U.S. Department o

> An Ipsos poll asked 1,004 adults, "If purchasing a used car made certain upgrades or features more affordable, what would be your preferred luxury upgrade?" The results indicated that 9% of males and 14% of females answered window tinting. Source: lpsos,

> The download and upload speeds of a mobile data carrier is of great interest to both individual and business users. The file City Download Speeds contains the average download speeds in Mbps for 100 cities in the United States. Source: Data extracted fro

> As a consultant to an investment company trading in various currencies, you have been assigned the task of studying long-term trends in the exchange rates of the Canadian dollar, the Japanese yen, and the English pound. Data from 1980 to 2018 are stored

> The American Society for Quality (ASQ) conducted a salary survey of all its members. ASQ members work in all areas of manufacturing and service-related institutions, with a common theme of an interest in quality. Two job titles are black belt and green b

> Scarlett and Heather, the owners of an upscale restaurant in Dayton, Ohio, want to study the dining characteristics of their customers. They decide to focus on two variables: the amount of money spent by customers and whether customers order dessert. The

> The branch manager of an outlet (Store I) of a nationwide chain of pet supply stores wants to study characteristics of her customers. In particular, she decides to focus on two variables: the amount of money spent by customers and whether the customers o

> The financial impact of IT systems downtime is a concern of plant operations management today. A survey of manufacturers examined the satisfaction level with the reliability and availability of their manufacturing IT applications. The variables of focus

> A national association devoted to HR and workplace programs, practices, and training wants to study HR department practices and employee turnover of its member organizations. HR professionals and organization executives focus on turnover not only because

> The human resource (HR) director of a large corporation wishes to study absenteeism among its mid-level managers at its central office during the year. A random sample of 25 mid-level managers reveals the following: Absenteeism: X = 6.2 days, S = 7.3 day

> In Problem 13.8, you used annual revenues to predict the current value of a MLB baseball team, using the data stored in MLB Values. Using the results of that problem, a. Determine the coefficient of determination, r2, and interpret its meaning. b. Determ

> An information technology (IT) provider of cloud backup and restore solutions for small to midsize businesses wants to study the consequences of ransom ware attacks. A random sample of 50 small to midsized companies in the United States that have experie

> A recent Timetric's survey of insurance professionals explores the use of technology in the industry. The file Technologies contains the responses to the question that asked what technologies these professionals expected to be most used by the insurance

> If X = 125, σ= 24, and n = 36, construct a 99% confidence interval estimate for the population mean, µ.

> Convert the following p-functions to molar concentrations: pH = 1.102. pOH = 0.0057. pBr = 7.77. pCa = -0.221. pLi = 12.35. pNO3 = 0.054. pMn = 0.135. pCl = 8.92.

> Refer to the data in the exercise 11-22. Use diagrams similar to those in Exhibits 11–6 and 11–8 to compute the variable-overhead spending and efficiency variances, and the fixed-overhead budget and volume variances.