Question: In Problem 14.5, you used the

> How long does it take to download a two-hour HD movie from a streaming media site? According to Fastmetrics's "Download Speed Comparison Table," bit.Iy/lEONXKY, downloading such a movie using a 100 Mbps Internet connection should take about 4.5 minutes.

> The U.S. Department of Transportation maintains statistics for mishandled bags. In January 2019, American Airlines mishandled 0.90 bags per day. What is the probability that in the next month, American Airlines will have; a. no mishandled bags? b. at lea

> In Problem 14.6, you used full-time voluntary turnover (%), and total worldwide revenue ($billions) to predict number of full-time job openings (stored in Best Companies). Develop a regression model to predict the number of full-time job openings that in

> The U.S. Department of Transportation maintains statistics for mishandled bags. In January 2019, Delta mishandled 0.32 bags per day. What is the probability that in the next month, Delta will have; a. no mishandled bags? b. at least one mishandled bag? c

> Repeat (a) and (b) of Problem 12.16, assuming that only 100 individuals from each business group were surveyed. Discuss the implications of sample size on the x2 test for differences among more than two populations. Data from Problem 12.16: An Employee

> Assume a Poisson distribution with λ = 5.0. What is the probability that; a. X = 1? b. X < 1? c. X > 1? d. X

> Churn occurs when customers stop doing business with a company or stop subscribing to a service. The file Bank Churn Study contains data from a churn study conducted by an international bank. Source: Data extracted from S. Dixit, "Building your own Anifi

> The file Restaurant Ratings contains restaurant ratings for food, decor, service, cost per person, and popularity index (popularity points the restaurant received divided by the number of people who voted for that restaurant) for various types of restaur

> The file Utility contains the following data about the cost of electricity (in $) during July 2018 for a random sample of 50 one-bedroom apartments in a large city. a. Construct a frequency distribution and a percentage distribution that have class inter

> The file Work Hours Needed contains the average number of hours worked necessary to afford the cost of three people attending a National Basketball Association (NBA) game, inclusive of parking and food and beverage costs, at each of the 30 NBA arenas dur

> Visit the website of the Pew Research organization at www.pewresearch.org. Read today's top story. What type of data source is the top story based on?

> Visit the website of the Gallup organization at www.gallup.corn. Read today's top story. What type of data source is the top story based on?

> Brand valuations are critical to CEOs, financial and marketing executives, security analysts, institutional investors, and others who depend on well-researched, reliable information needed for assessments and comparisons in decision making. Millward Brow

> In Problem 14.4, you used efficiency ratio and total risk-based capital to predict ROAA at a community bank (stored in Community Banks). Develop a regression model to predict ROAA that includes efficiency ratio, total risk-based capital, and the interact

> The file Hybrid Sales contains the number of domestic and imported hybrid vehicles sold in the United States from 1999 to 2018. Source: Data extracted from "Gasoline Hybrid and Electric Vehicle Sales," bit.ly/2nLkvXf, and "Advanced Technology Vehicle Sal

> Wally's Discount Stores sell basic essentials for food, home, health, apparel, and home. Wally's produces and sells private label goods under its ShowGo label in addition to select nationally advertised brands. The file Wally contains a sample of 4 10 Wa

> 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

> A hospital conducted a study of the waiting time in its emergency room. The hospital has a main campus and three affiliated locations. Management had a business objective of reducing waiting time for emergency room cases that did not require immediate at

> The more costly and time-consuming it is to export and import, the more difficult it is for local companies to be competitive and to reach international markets. As part of an initial investigation exploring foreign market entry, 10 countries were select

> The file Coffee Exports contains the coffee exports (in thousands of 60 kg bags) by Costa Rica from 2004 to 2018. a. Plot the data. b. Fit a three-year moving average to the data and plot the results. c. Using a smoothing coefficient of W = 0.50, exponen

> Many factors affect attendance at Major League Baseball (MLB) games. Among the factors are those relating to the capacity of the stadium, how the team performed during the season, and characteristics about the team itself. For each MLB team in a recent y

> In 20 17, the per capita consumption of bottled water in the United States was reported to be 42.1 gallons. Source: Data extracted from IBWA, "Bottled Water Market," bit.ly/2Jlmynt. Assume that the per capita consumption of bottled water in the United St

> The following table, stored in, contains the 2018 sources of electricity in the United States as reported by the Energy Information Administration. What conclusions can you reach about sources of energy in 2018?

> A sample of companies were asked three questions about analytics and artificial intelligence usage and their answers stored in Business Analytics, Machine Learning and Self-Learning Robots. The following tables summarize those answers. Source: Data extra

> Given the results from Problem 11.20, a. at the 0.05 level of significance, is there an effect due to factor A? b. at the 0.05 level of significance, is there an effect due to factor B? c. at the 0.05 level of significance, is there an interaction effect

> The following table, stored in Smartphone Sales, represents the quarterly market share (percentage) of smartphones, by type, for the third quarter of 2017 through the third quarter of 2018, as reported by Counterpoint Research. a. What conclusions can yo

> The file Natural Gas includes the monthly average commercial price for natural gas (dollars per thousand cubic feet) in the United States from January 1, 2008, to December 2018. Source: Data extracted from Energy Information Administration, "Natural Gas

> The data in New Home Sales include the median sales price of new single-family houses sold in the United States recorded at the end of each month from January 2000 through December 2017. Source: Data extracted from "New Residential Sales," bit.ly/2eEcIBR

> Even though there has been an abundance of digital and analytics transformations occurring across the business landscape in recent years, few companies report achieving successful results. What has been the major objectives of company digital and analyti

> The Super Bowl is a big viewing event watched by close to 200 million Americans that is also a big event for advertisers. The file Super Bowl Ad Costs contains the average cost for 30-second ads that ran between the opening kick-off and the final whistle

> The file Movie Attendance contains the yearly movie attendance (in billions) from 2001 through 2018. a. Construct a time-series plot for the movie attendance (in billions). b. What pattern, if any, is present in the data?

> How have stocks performed in the past? The following table presents the data stored in Stock Performance and shows the performance of a broad measure of stocks (by percentage) for each decade from the 1830s through 2018: a. Construct a time-series plot o

> The following is a series of annual sales (in $millions) over an 11-year period (2008 to 2018): Year: 2008 2009 2010 201120122013 2014 2015 2016 2017 2018 Sales: 13.0 17.0 19.0 20.0 20.5 20.5 20.5 20.0 19.0 17.0 13.0 a. Construct a time-series plot. b. D

> The following is a set of data from a sample of n = 5: 7, 4, 9, 8, 2 a. Calculate the first quartile (Q1), the third quartile (Q3), and the interquartile range. b. List the five-number summary. c. Construct a boxplot and describe its shape. d. Compare yo

> The following is a set of data from a sample of n = 6: 7, 4, 9, 7, 3, 12 a. Calculate the first quartile (Q1), the third quartile (Q3), and the interquartile range. b. List the five-number summary. c. Construct a boxplot and describe its shape. d. Compar

> In Problem 14.4, you used efficiency ratio and total risk-based capital to predict ROAA at a community bank (stored in Best Companies). Using the results from that problem, a. Constructs a 95% confidence interval estimate of the population slope between

> The file contains the mobile commerce penetration values, the percentage of the country population that bought something online via a mobile phone in the past month, for 24 of the world's economies. Source: Data extracted from "Mobile commerce share by c

> A simple random sample of n = 300 full-time employees is selected from a company list containing the names of all N = 5,000 full-time employees in order to evaluate job satisfaction. a. Give an example of possible coverage error. b. Give an example of po

> A recent survey (available at bit.ly/2H5mQ6g) points to the transformation underway in the automotive retail landscape. The 2019 KPMG Global Automotive Executive Study found that automobile executives believe the number of physical automotive retail outl

> A 201 9 PwC survey of 1,000 U.S. executives (available at pwc.to/2DAHI4q) indicated that artificial intelligence (AI) is no longer seen as a side project or science experiment. Eighty percent of U.S. CEOs think AI will significantly change the way they w

> A growing share of Americans use smartphones as their primary means of online access at home. A survey of U.S. adults found that 58% of the 18- to 29-year-olds, 47% of the 30- to 49-year-olds, 27% of the 50- to 64-year-olds, and 15% of those age 65 or ol

> Results of the 2019 annual banking priorities survey of a sample of 220 bankers nationwide by Computer Services, Inc., available at bit.ly/2POHAlk, reveal insights on key areas of strategic focus and spending among financial institutions. The results sho

> The file CD Rates contains the yields for one-year CDs and five-year CDs, for 46 financial institutions selling in Lake Worth, Florida, as of April 5, 2019. Source: Data extracted from www.Bankrate.com, April 5, 2019. For each type of account: a. Calcula

> 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 Ratings contains the rating of ads that ran between the opening kick-off and the final whistle. Source: Dat

> A financial services call center monitors call duration, the amount of time spent speaking to customers on the phone. The file Call Duration contains the data for time, in seconds, agents spent talking to 50 customers. a. Calculate the first quartile (Q1

> Ipsos polled 1,004 adults asking them, "If purchasing a used car made certain upgrades or features more affordable, what would be your preferred luxury upgrade?" The summarized results show that 9% of males and 14% of females answered window tinting. Sou

> In Problem 14.4, you used efficiency ratio and total risk-based capital to predict ROAA at a community bank (stored in Community Banks). a. Plot the residuals versus Y^i. b. Plot the residuals versus X1i. c. Plot the residuals versus X2i. d. In the resid

> The file Accounting Partners contains the number of partners in a cohort of rising accounting firms that have been tagged as "firms to watch." Source: Data extracted from 2019 Top 100 Firms, Bloomberg BNA, accounting today.com. a. Calculate the first qua

> The following is a set of data from a sample of n = 5: 7, -5, -8, 7, 9 a. Calculate the first quartile (Q1), the third quartile (Q3), and the interquartile range. b. List the five-number summary. c. Construct a boxplot and describe its shape. d. Compare

> What prevented the widespread adoption of business analytics in the past?

> What is the difference between coverage error and nonresponse error?

> What is the difference between a missing value and an outlier?

> What is the difference between a categorical variable and a numerical variable?

> What is the difference between a statistic and a parameter?

> A recent 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 expect to be most used by the insurance industry in t

> How does the multiplication rule differ for events that are and are not independent?

> What is the difference between a simple event and a joint event?

> What are the assumptions of AN OVA?

> What is text analytics relationship to clustering and association methods?

> How will marketers change their organic (unpaid) social media postings in the near future? A survey by Social Media Examiner reported that 65% of B2B marketers (marketers who focus primarily on attracting businesses) plan to increase LinkedIn organic soc

> Referring to Problem 7 .18, the same survey reported that 20.9% of German companies have women directors and 80% have three or more women on the board. If you select a random sample of 200 German companies, a. what is the probability that the sample will

> How do dashboards enable business analytics users to explore data?

> A financial services call center monitors call duration, the amount of time spent speaking to customers on the phone. The file Call Duration contains the data for time, in seconds, agents spent talking to 50 customers: a. Calculate the mean, median, and

> Is there a difference in the variation of the yields of different types of investments? The file CD Rates contains the yields for one year certificates of deposit (CDs) and five-year CDs for 46 banks listed for West Palm Beach, Florida on April 5. Source

> The file contains the mobile commerce penetration values, the percentage of the country population that bought something online via a mobile phone in the past month, for 24 of the world's economies. Source: Data extracted from Statistica.com, bit.Iy/2vsn

> The following table, stored in Residential Electricity Usage, indicates the percentage of residential electricity consumption in the United States in 2018, organized by type of use. a. Construct a bar chart, a pie chart, and a Pareto chart. b. Which grap

> The file Accounting Partners contains the number of partners in a cohort of rising accounting firms that have been tagged as "firms to watch." Source: Data extracted from 2019 Top 100 Firms, Bloomberg BNA, accountingtoday.com. a. Calculate the mean, medi

> In Problem 14.3, you predicted non-profit charitable commitment, based on non-profit revenue and fundraising efficiency. The regression analysis resulted in this ANOVA table: Determine whether there is a significant relationship between commitment and th

> The file Mobile Speed contains the overall download and upload speeds in Mbps for eight carriers in the United States. For the download speed and the upload speed separately: a. Calculate the mean and median. b. Calculate the variance, standard deviation

> According to the U.S. Census Bureau (census.gov), the median sales price of new houses was $326,200, and the mean sales price was $384,600. a. Interpret the median sales price. b. Interpret the mean sales price. c. Discuss the shape of the distribution o

> What is meant by "data dimensionality?"

> Wired, a magazine that delivers a glimpse into the future of business, culture, innovation, and science, reported the following summary for the household incomes of its two types of subscribers, the print reader and the digital reader. Interpret the medi

> How are decision criteria used in decision rules?

> Explain the difference between explanatory and prediction models.

> What is artificial intelligence, and what is its relationship to machine learning?

> The following is a set of data from a sample of n = 7: 12, 7, 4, 9, 0, 7, 3 a. Calculate the first quartile (Q1), the third quartile (Q3), and the interquartile range. b. List the five-number summary. c. Construct a boxplot and describe its shape. d. Com

> In Example 5.4, you and two friends decided to go to Wendy's. Now, suppose that instead you go to Burger King, which recently filled approximately 90.9% of orders correctly. What is the probability that; a. all three orders will be filled correctly? b. n

> In the last quarter of 2018, 47% of U.S. smartphone owners owned an iPhone. Source: Data extracted from pewrsr.ch/2riDGV6. Using the binomial distribution, what is the probability that of the next six Americans who own a smartphone surveyed, a. four will

> CarMD reports that the mean repair cost of a Toyota in 2018 for a "check engine" light was $482. Source:www.carmd.com/wp/vehicle-health-index-introduction/2018-carmdmanufacturer-vehicle-rankings Suppose a sample of 100 "check engine" light repairs comple

> In Problem 9.44, what is your statistical decision if tSTAT = - 3.15? Data from Problem 9.44: In a one-tail hypothesis test where you reject H0 only in the lower tail, what is the critical value of the tSTAT test statistic with 20 degrees of freedom at

> In Problem 9 .40, what is the statistical decision if you test the null hypothesis at the 0.05 level of significance? Data from Problem 9.40: In a one-tail hypothesis test where you reject H0 only in the lower tail, what is the p-value if ZSTAT = + 1.38

> In Example 5.4, you and two friends decided to go to Wendy's. Now, suppose that instead you go to McDonald's, which recently filled approximately 92.9% of the orders correctly. What is the probability that; a. all three orders will be filled correctly? b

> You are working as an assistant to the dean of institutional research at your university. The dean wants to survey members of the alumni association who obtained their baccalaureate degrees five years ago to learn what their starting salaries were in the

> In Problems 9.18 and 9.19, what are the critical values of t if the level of significance, α, is 0.05 and the alternative hypothesis, H1, is µ, ≠ 50? Data from Problem 9.19: In Problem 9. 18, how many degrees of freedom does the t test have? Data from

> In Problem 9. 18, how many degrees of freedom does the t test have? Data from Problem 9.18: If, in a sample of n = 16 selected from a normal population, X = 56 and S = 12, what is the value of tSTAT if you are testing the null hypothesis H0: µ, = 50?

> If, in a sample of n = 16 selected from a normal population, X = 56 and S = 12, what is the value of tSTAT if you are testing the null hypothesis H0: µ, = 50?

> 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: If a SMB owner is selected at random, what is the

> One operation of a steel mill is to cut pieces of steel into parts that are used in the frame for front seats in an automobile. The steel is cut with a diamond saw and the resulting parts must be cut to be within ± 0.005 inch of the length specified by t

> The file Fast Casual contains the amount that a sample of 15 customers spent for lunch ($) at a fast-food restaurant: a. At the 0.05 level of significance, is there evidence that the mean amount spent for lunch is different from $6.50? b. Determine the p

> A manufacturer of chocolate candies uses machines to package candies as they move along a filling line. Although the packages are labelled as 8 ounces, the company wants the packages to contain a mean of 8.15 ounces so that virtually none of the packages

> What is the difference between the geometric mean and the geometric rate of return?

> If, in a sample of n = 160 selected from a left-skewed population, X = 65, and S = 21, would you use the t test to test the null hypothesis H0: µ, = 60? Discuss.

> If, in a sample of n = 16 selected from a left-skewed population, X = 65, and S = 21, would you use the t test to test the null hypothesis H0: µ, = 60? Discuss.

> How do the boxplots for distributions of varying shapes differ?

> If you use a 0.05 level of significance in a two-tail hypothesis test, what is your decision rule for rejecting a null hypothesis that the population mean equals 500 if you use the Z test?

> In Problems 9.18, 9.19, and 9.20, what is your statistical decision if the alternative hypothesis, H1, is µ, # 50? Data from Problem 9.20: In Problems 9.18 and 9.19, what are the critical values of t if the level of significance, α, is 0.05 and the alte

> The file Fast Casual contains the amount that a sample of 15 customers spent for lunch ($) at a fast casual restaurant: a. Construct a 95% confidence interval estimate for the population mean amount spent for lunch ($) at a fast casual restaurant. b. Int

> The following table, stored in Energy Sources, contains the 2018 sources of electricity in the United States as reported by the Energy Information Administration. a. Construct a Pareto chart. b. What percentage of power is derived from coal, nuclear, or

> If X = 75, S = 24, and n = 36, and assuming that the population is normally distributed, construct a 95% confidence interval estimate for the population mean, µ.

> Is there a difference in the yields of different types of investments? The file CD Rates contains the yields for a one-year certificate of deposit (CD) and a five-year CD sold by 46 financial institutions in Lake Worth, Florida, as of April 5, 2019. Sour