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Questions and Answers of Statistics

Does gamification motivate customer research management (CRM) utilization? Gamification is the use of game mechanics to motivate, modify, or reward distinct behaviors. In the context of sales
How often do Facebook users post? A study by the Pew Research Center (data extracted from bit.ly/1axbobZ) revealed the following resultsAt the 0.01 level of significance, is there evidence of a
In Problem 13.4 on page 500, the percentage of alcohol was used to predict wine quality (stored in Vinho Verde). For those data, SSR = 21.8677 and SST = 64.0000. a. Determine the coefficient of
In Problem 13.8 on page 501, you used annual revenues to predict the value of a baseball franchise. Using the results of that problem, a. Determine the coefficient of determination, r2, and
The production of wine is a multibillion-dollar worldwide industry. In an attempt to develop a model of wine quality as judged by wine experts, data was collected from red wine variants of Portuguese
A shoe manufacturer is considering developing a new brand of running shoes. The business problem facing the marketing analyst is to determine which variables should be used to predict durability
A mail-order catalog business selling personal computer supplies, software, and hardware maintains a centralized warehouse. Management is currently examining the process of distribution from the
In mining engineering, holes are often drilled through rock, using drill bits. As a drill hole gets deeper, additional rods are added to the drill bit to enable additional drilling to take place. It
A study was conducted to determine the factors involved in the rate of participation of discharged cardiac patients in a rehabilitation program. Data were collected from 516 treated patients. Among
An automotive insurance company wants to predict which filed stolen vehicle claims are fraudulent, based on the mean number of claims submitted per year by the policy holder and whether the policy is
A marketing manager wants to predict customers with the risk of churning (switching their service contracts to another company) based on the number of calls the customer makes to the company call
In Problem 14.4 on page 548, you used sales and number of orders to predict distribution costs at a mail-order catalog business (stored in Warecost). Perform an influence analysis on your results and
In Problem 14.5 on page 549, you used the percentage of alcohol and the chlorides to predict wine quality (stored in VinhoVerde). Perform an influence analysis on your results and determine whether
In Problem 14.6 on page 549, you used the amount of radio advertising and newspaper advertising to predict sales (stored in Advertise. Perform an influence analysis on your results and determine
In Problem 14.7 on page 549, you used the total staff present and remote hours to predict standby hours (stored in Standby). Perform an influence analysis on your results and determine whether any
In Problem 14.8 on page 549, you used the land area of the property and age in years to predict fair market value (stored in GlenCove). Perform an influence analysis on your results and determine
Professional basketball has truly become a sport that generates interest among fans around the world. More and more players come from outside the United States to play in the National Basketball
A sample of 30 houses recently listed for sale in Silver Spring, Maryland, was selected with the objective of developing a model to predict the assessed value (in $thousands), using the size of the
Maryland, was selected with the objective of developing a model to predict the taxes (in $) based on the assessed value of houses (in $thousands) and the age of the houses (in years) (stored in
The file FTMBA contains a sample of 2012 top-ranked full-time MBA programs. Variables included are mean starting salary upon graduation ($), percent of students with job offers within three months of
A national chain of consumer electronics stores had the business objective of determining the effectiveness of newspaper advertising. To promote sales, the chain relies heavily on local newspaper
In the production of printed circuit boards, errors in the alignment of electrical connections are a source of scrap. The data in the file Registration Error-High Cost contains the registration error
A production manager wishes to examine the relationship between unit production (number of units produced) and associated costs (total cost). The file Cost-Estimation contains data for 10 months of
Researchers wanted to investigate the relationship between employment and accommodation capacity in the European travel and tourism industry. The file Euro Tourism contains a sample of 27 European
Bed Bath & Beyond is a nationwide chain of retail stores that sell a wide assortment of merchandise, including domestics merchandise and home furnishings, as well as food, giftware, and health and
The average salary of Major League Baseball players on opening day from 2000 to 2013 is stored in BB-Salaries and shown below.a. Plot the data.b. Compute a linear trend forecasting equation and plot
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 Ts-Model-2:a. Plot the observed
Using the data for Problem 16.15 on page 646 that represent U.S. total computer and software sales (in $millions) from 1992 through 2012 (stored in Computer Sales), a. Fit a third-order
Using the data for Problem 16.12 on page 645 concerning the number of stores open for Bed Bath & Beyond from 1997 through 2013 (stored in Bed & Bath), a. Fit a third-order autoregressive model to the
Using the data for Problem 16.17 on page 646 concerning the number of passenger cars produced in the United States from 1999 to 2012 (stored in Car-Production), a. Fit a third-order autoregressive
You are using exponential smoothing on an annual time series concerning total revenues (in $millions). You decide to use a smoothing coefficient of W = 0.20, and the exponentially smoothed value for
Using the average baseball salary from 2000 through 2013 data for Problem 16.18 on page 646 (stored in BB-Salaries), a. Fit a third-order autoregressive model to the average baseball salary and test
Using the yearly amount of solar power generated by utilities (in millions of kWh) in the United States from 2002 through 2012 data for Problem 16.16 on page 646 (stored in Solar Power), a. Fit a
Using the number of stores open for Bed Bath & Beyond from 1997 through 2013 data for Problem 16.12 on page 645 and Problem 16.28 on page 654 (stored in Bed & Bath ), a. Perform a residual analysis
Using the number of passenger cars produced in the U.S. from 1999 to 2012 data for Problem 16.17 on page 646 and Problem 16.29 on page 654 (stored in Car Production), a. Perform a residual analysis
Using the average baseball salary from 2000 through 2013 data for Problem 16.18 on page 646 and Problem 16.30 on page 654 (stored in BB-Salaries), a. Perform a residual analysis for each model. b.
The data below (stored in Drive-Thru Speed) represent the average time (in seconds) it took to be served at the drive-through at McDonald's from 1998 to 2012:a. Plot the time series.b. Fit a
In forecasting a monthly time series over a five-year period from January 2009 to December 2013, the exponential trend forecasting equation for January is log ŷi = 2.0 + 0.01 Xi + 0.10
Refer to the exponential model given in Problem 16.42.a. What is the fitted value of the series in the fourth quarter of 2011?b. What is the fitted value of the series in the first quarter of 2011?c.
The data in Toys R Us are quarterly revenues (in $millions) for Toys R Us from 1996-Q1 through 2013-Q1. a. Do you think that the revenues for Toys R Us are subject to seasonal variation? Explain. b.
Are gasoline prices higher during the height of the summer vacation season than at other times? The file Gas Prices contains the mean monthly prices (in $/gallon) for unleaded gasoline in the United
The file Silver-Q contains the price in London for an ounce of silver (in US$) at the end of each quarter from 2004 through 2012. a. Plot the data. b. Develop an exponential trend forecasting
The file Gold contains the price in London for an ounce of gold (in US$) at the end of each quarter from 2004 through 2012. a. Plot the data. b. Develop an exponential trend forecasting equation
The following data, stored in Spills provide the number of oil spills in the Gulf of Mexico from 1996 to 2012:a. Plot the time series.b. Fit a three-year moving average to the data and plot the
The U.S. Department of Labor gathers and publishes statistics concerning the labor market. The file Workforce contains data on the size of the U.S. civilian non-institutional population of people 16
The data in the following table, stored in McDonalds, represent the gross revenues (in billions of current dollars) of McDonald's Corporation from 1975 through 2012:a. Plot the data. b. Compute the
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
The following data (stored in Coffee Prices Portugal) represent the retail price of coffee (in € / kg) in Portugal from 2004 to 2011: ............................. Retail Price Year
The Edmunds.com NHTSA Complaints Activity Report is the result of the examination of the frequency, trends and composition of consumer vehicle complaint submissions at the automaker, brand, and
The value of a National Basketball Association (NBA) franchise has increased dramatically over the past few years. The value of a franchise varies based on the size of the city in which the team is
The annual ranking of the FT Global 500 2013 provides a snapshot of the world's largest companies. The companies are ranked by market capitalization-the greater the stock market value of a company,
Your task as a member of the International Strategic Management Team at your company is to investigate the potential for entry into a foreign market. As part of your initial investigation, you must
There are a very large number of mutual funds from which an investor can choose. Each mutual fund has its own mix of different types of investments. The file BestFunds1 contains the one-year return
A hotel has designed a new system for room service delivery of breakfast that allows the customer to select a specific delivery time. The file Satisfaction contains the difference between the actual
A marketing manager wants to predict customers with risk of churning (switching their service contracts to another company) based on the number of calls the customer makes to the company call center
An automotive insurance company wants to predict which filed stolen vehicle claims are fraudulent, based on the number of claims submitted per year by the policy holder and whether the policy is a
The business problem facing a consumer products company is to measure the effectiveness of different types of advertising media in the promotion of its products. Specifically, the company is
Starbucks Coffee Co. uses a data-based approach for improving the quality and customer satisfaction of its products. When survey data indicated that Starbucks needed to improve its package sealing
The owner of a moving company typically has his most experienced manager predict the total number of labor hours that will be required to complete an upcoming move. This approach has proved useful in
A financial analyst was interested in comparing the priceto- book ratio (P/B) of drug companies. The analyst collected P/B ratios for 71 drug companies (Industry Group SIC 3 code: 283) and stored
Movie companies need to predict the gross receipts of individual movies once the movie has debuted. The following results, stored in PotterMovies , are the first weekend gross, the U.S. gross, and
The file Cereals contains the calories, carbohydrates, and sugar, in grams, in one serving of seven breakfast cereals. a. Perform a cluster analysis using the complete linkage method on the cereals
The file Protein contains calorie and cholesterol information for popular protein foods (fresh red meats, poultry, and fish) compiled by the U.S. Department of Agriculture.a. Perform a cluster
The file BBCost2012 contains the total cost (in $) for four tickets, two beers, four soft drinks, four hot dogs, two game programs, two baseball caps, and parking for one vehicle at each of the 30
A Pew Research Center survey found that social networking is popular in many nations around the world. The file GlobalSocialMedia contains the level of social media networking (measured as the
Movie companies need to predict the gross receipts of individual movies once the movie has debuted. The following results, stored in PotterMovies , are the first weekend gross, the U.S. gross, and
The file Cereals contains the calories, carbohydrates, and sugar, in grams, in one serving of seven breakfast cereals. a. Perform a multidimensional scaling analysis on the cereals based on the
The file Protein contains calorie and cholesterol information for popular protein foods (fresh red meats, poultry, and fish) compiled by the U.S. Department of Agriculture. a. Perform a
A Pew Research Center survey found that social networking is popular in many nations around the world. The file GlobalSocialMedia contains the level of social media networking (measured as the
What is the difference between a gauge and a bullet graph, and what are the advantages and disadvantages of each?
What is the purpose of a treemap?
How do classification trees differ from regression trees?
How do classification and regression tree models differ from neural net models?
Referring to the data in Problem 2.56 on page 68 concerning movie attendance between 2002 and 2012 (stored in Movie Attendance2 ): Data From Problem 2.56 Year................ Attendance
How does cluster analysis differ from multidimensional scaling?
The file DomesticBeer2 contains the number of calories per 12 ounces and number of carbohydrates (in grams) per 12 ounces for a sample of 15 of the best-selling domestic beers in the United States.
The file Currency2 contains the value of the Canadian dollar, English pound, and Euro for one U.S. dollar from 2002 to 2012.a. Construct sparklines for the value of the U.S. dollar in terms of the
The file FTMBA contains a sample of 2012 top-ranked full-time MBA programs. Variables included are mean starting salary upon graduation ($), percentage of students with job offers within three months
Nassau County is located approximately 25 miles east of New York City. Data in GlenCove are from a sample of 30 single-family homes located in Glen Cove. Variables included are the fair market value,
The file StockIndices contains the data that represent the total rate of return (in percentage) for the Dow Jones Industrial Average (DJIA), the Standard & Poor's 500 (S&P 500), and the
From 2006 to 2012, the value of precious metals fluctuated dramatically. The file Metal Indices contains the total rate of return (in percentage) for platinum, gold, and silver from 2006 through
Drive-through service time is an important quality attribute for fast food chains. The data in ServiceTime are the mean service times for Burger King, Chick-Fil-A, McDonald's, and Wendy's in 12
Sales of automobiles in the United States fluctuate from month to month and year to year. The data in the file AutoSales represent the sales for various manufacturers in July 2013 and the change from
Zagat's publishes restaurant ratings for various locations in the United States. The file Restaurants2 contains the Zagat rating for food, décor, service, cost per person, and popularity index
A survey was conducted on the characteristics of households in the United States. The data (which have been altered from an actual study to preserve the anonymity of the respondents) are stored in
The file HybridSales contains the number of domestic and imported hybrid vehicles sold in the United States from 1999 to 2012. You want to be able to predict the number of domestic and imported
The file EuroTourism2 contains a sample of 27 European countries. Variables included are the number of jobs generated in the travel and tourism industry in 2012, the spending on business travel
The file Philly contains a sample of 25 neighborhoods in Philadelphia. Variables included are neighborhood population, median sales price of homes in 2012, mean number of days homes were on the
Professional basketball has truly become a sport that generates interest among fans around the world. More and more players come from outside the United States to play in the National Basketball
The data in UsedCars represent characteristics of cars that are currently part of an inventory of a used car dealership. The variables included are car, year, age, price ($), mileage, power (hp), and
The following examples are experiments and their associated random variables. In each case identify the values the random variable can assume and state whether the random variable is discrete or
The College Board National Office recently reported that in 2011-2012, the 547,038 high school juniors who took the ACT achieved a mean score of 530 with a standard deviation of 123 on the
CopRadar.com reports that the average time for an average driver to react to a red traffic light (which includes recognizing that the light has changed, deciding to stop or to continue, and engaging
Consider a variation of the PDC decision tree shown in Figure 4.9. The company must first decide whether to undertake the market research study. If the market research study is conducted, the outcome
Suppose that the point spread for a particular sporting event is 10 points and that with this spread you are convinced you would have a 0.60 probability of winning a bet on your team. However, the
Consider the following time series data.a. Construct a time series plot. What type of pattern exists in the data? b. Use a multiple regression model with dummy variables as follows to develop an
Xpress Technologies offers complete web design, programming, implementation, and hosting services for customers. Xpress prices their services by the project and categorizes each customer request into
The analytics department head at a major mid-western university will be scheduling faculty to teach courses during the coming autumn term. Four core courses need to be covered. The four courses are
Recall the Martin-Beck Company supply chain design problem in Section 11.3. a. Modify the formulation shown in Section 11.3 to account for the policy restriction that a plant must be located either
Consider the following all-integer linear program: Max 1x1 + 1x2 s.t. 4x1 + 6x2 ( 22 1x1 + 5x2 ( 15 2x1 + 1x2 ( 9 x1, x2 ( 0 and integer a. Graph the constraints for this problem. Use dots to

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