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business
statistics for business and economics

Questions and Answers of Statistics For Business And Economics

Banning controversial sports team sponsors. Refer to the Journal of Marketing Research (October 2015) study of the impact of banning a controversial sponsor on a sports team’s success, Exercise
Bubble behavior in subcooled flow boiling. Refer to the Heat Transfer Engineering (Vol. 34, 2013) study of bubble behavior in subcooled flow boiling, Exercise 12.46 (p. 744). Using data saved in the
Failure times of silicon wafer microchips. Refer to the National Semiconductor study of manufactured silicon wafer integrated circuit chips, Exercise 12.63 (p. 753). Recall that the failure times of
Reality TV and cosmetic surgery. Refer to the Body Image: An International Journal of Research (March 2010) study of the influence of reality TV shows on one’s desire to undergo cosmetic surgery,
Arsenic in groundwater. Refer to the Environmental Science & Technology (January 2005) study of the reliability of a commercial kit to test for arsenic in groundwater, Exercise 12.16 (p. 728). Recall
Systematic risk for Chinese banks. Refer to the Applied Economics Letters (Vol. 27, 2020) study of the impact of internet finance on the level of systematic risk in the Chinese banking industry,
Refer to the Scientific Reports (2020) study on the factors associated with cross-country variation in COVID-19 mortality, Exercise 11.75 (p. 683). The study models the COVID-19 mortality rate (y)
Personality traits and job performance. Refer to the Journal of Applied Psychology (January 2011) study of the determinants of task performance, Exercise 12.94 (p. 770). In addition to x1 =
State casket sales restrictions. Some states permit only licensed firms to sell funeral goods (e.g., caskets, urns) to the consumer, while other states have no restrictions. States with casket sales
Emotional intelligence and team performance. Refer to the Engineering Project Organizational Journal (Vol. 3, 2013) study of the relationship between emotional intelligence of individual team members
Identify the problem(s) (if any) in each of the residual NW plots shown below. Applying the Concepts—Basic
A study in Jurnal Mantik (Vol. 4, 2020) analyzed the effect of price, sales promotion, and personal selling on customers’ decision to purchase the Daihatsu Sirion at PT Capella Medan, a car dealer
Adverse effects of hot-water runoff. The Environmental Protection Agency (EPA) wants to determine whether the hot-water runoff from a particular power plant located near a large gulf is having an
Systematic risk for Chinese banks. Internet finance is a business model in which traditional financial institutions conduct business via the internet. In Applied Economics Letters (Vol. 27, 2020),
Reality TV and cosmetic surgery. Refer to the Body Image: An International Journal of Research (March 2010) study of the influence of reality TV shows on one’s desire to undergo cosmetic surgery,
Residential community housing prices. A paper published in the Journal of Physics: Conference Series (2020) studied the factors that affect house prices in a residential community in Jinan. A model
Supply chain management performance. The leadership characteristics of supply chain managers were investigated in the Journal of the International Academy for Case Studies (Vol. 26, 2020). Each in a
Risk management performance. An article in the International Journal of Production Economics (Vol. 171, 2016) investigated the factors associated with a firm’s supply chain risk management
Teacher pay and pupil performance. In Economic Policy (January 2011), researchers from the London School of Economics conducted a cross-country analysis of the relationship between teacher’s pay
There are five independent variables, x1, x2, x3, x4, and x5, that might be useful in predicting a response y. A total of n = 40 observations is available, and it is decided to employ stepwise
Job performance under time pressure. Refer to the Academy of Management Journal (October 2015) study of how time pressure affects team job performance, Exercise 12.89 (p. 768). Recall that the
Hotel guest service experience. The hotel guest service experience was investigated in the Journal of Hospitality, Marketing, and Management (Vol. 29, 2020). Using data on over 45,000 hotel guest
Restaurant business. Refer to the yearly sales (in $ million) (y) of four types of restaurants together with their respective year-over-year (YOY) and number of units (in %), Exercise 12.95 (p.
Agreeableness, gender, and wages. Refer to the Journal of Personality and Social Psychology (February 2012) study of on-the-job agreeableness and wages, Exercise 12.92 (p. 769). The researchers
Prediction of dissolved oxygen in rivers. A research article published in Hindawi, Complexity (2020) predicted the dissolved oxygen (DO) in the Nyando River basin in Kenya. To understand the
Reality TV and cosmetic surgery. Refer to the Body Image: An International Journal of Research (March 2010) study of the influence of reality TV shows on one’s desire to undergo cosmetic surgery,
Facial features of successful financial analysts. Refer to the Journal of Accounting Research (September 2019) study of the facial features of successful financial analysts, Exercise 12.70 (p. 759).
Workplace bullying and intention to leave. Refer to the Human Resource Management Journal (October 2008) study of workplace bullying, Exercise 12.91 (p. 769). Recall that multiple regression was used
Buy-side vs. sell-side analysts’ earnings forecasts. Refer to the Financial Analysts Journal (July/August 2008) comparison of earnings forecasts of buy-side and sellside analysts, Exercise 12.74
Shared leadership in airplane crews. Refer to the Human Factors (March 2014) study of shared leadership by the cockpit and cabin crews of a commercial airplane, Exercise 8.14 (p. 469). Recall that
The complete model y = b0 + b1x1 + b2x2 + b3x1 2 + b4x1 x2 + e was fit to n = 32 data points, with SSE = 1,425. The reduced model, y = b0 + b1x1 + b2x2 +e, was also fit, with SSE = 1,1180.a. How
Suppose you fit the regression model y = b0 + b1x1 + b2x2 + b3x3 + b4x1 2 + b5x3 2 + b6x1x3 + e to n = 28 data points and wish to test H0: b4 = b5 = b6 = 0a. State the alternative hypothesis Ha.b.
Determine which pairs of the following models are “nested” models. For each pair of nested models, identify the complete and reduced model.a. E1y2 = b0 + b1x1b. E1y2 = b0 + b1x1 + b2x2 + b3x3c.
Charisma of top-level leaders. Refer to the Academy of Management Journal (August 2015) study of the charisma of top leaders in business, Exercise 12.76 (p. 760). The researchers analyzed data
Restaurant business. A data set containing the rankings of restaurant businesses in 2020 was created by the Restaurant Business magazine. Four different restaurant types (Bakery Café, BBQ, Burger
Personality traits and job performance. Refer to the Journal of Applied Psychology (January 2011) study of the relationship between task performance and conscientiousness, Exercise 12.54 (p. 750).
Real estate valuation. Refer to Exercise 12.18 (p. 728) for the data set of real estate valuations and a model relating the mean house price per unit area E1y2 of properties to x1 = house age (in
Agreeableness, gender, and wages. Do agreeable individuals get paid less, on average, than those who are less agreeable on the job? And is this gap greater for males than for females? These
Workplace bullying and intention to leave. Workplace bullying has been shown to have a negative psychological effect on victims, often leading the victim to quit or resign. In Human Resource
Defection from a service based on payment plan. Refer to the Journal of Marketing Research (October 2019) study on defection from a service plan, Exercise 12.40 (p. 742). The researchers fit the
Job performance under time pressure. Time pressure is common at firms that must meet hard and fast deadlines. How do employees working in teams perform when they perceive time pressure? And, can this
Highway traffic volume. Refer to the Transportation Engineering (Vol. 2, 2020) study that assessed the impact of snowfall and cold temperature on classified vehicle volume variation using five years
Reality TV and cosmetic surgery. Refer to the Body Image: An International Journal of Research (March 2010) study of the impact of reality TV shows on a college student’s decision to undergo
Write a model that relates E1y2 to two independent variables—one quantitative and one qualitative at four levels. Construct a model that allows the associated response curves to be second-order but
Consider the model: E1y2 = b0 + b1x1 + b2x2 + b3x2 2 + b4x3 + b5x1x2 2 where x2 is a quantitative model and where x1 = e 1 received treatment 0 did not received treatment The resulting least squares
Consider the model: E1y2 = b0 + b1x1 + b2x2 + b3x3 + e where x1 is a quantitative variable and x2 and x3 are dummy variables describing a qualitative variable at three levels using the coding scheme
Refer to Exercise 12.82.a. Write a complete second-order model that relates E1y2 to the quantitative variable.b. Add the main effect terms for the qualitative variable (at three levels) to the model
Consider a multiple regression model for a response y, with one quantitative independent variable x1 and one qualitative variable at three levels.a. Write a first-order model that relates the mean
Banning controversial sports team sponsors. Refer to the Journal of Marketing Research (October 2015) study of the impact of banning a controversial sponsor on a sports team’s success, Exercise
Economics in the UK. A researcher examined intersecting ethnic and migrant status inequalities, work-hour changes, and the impact of COVID-19 on people’s economic wellbeing in the UK, publishing
Improving driving performance while fatigued. Refer to the Human Factors (May, 2014) study of driving performance while fatigued, Exercise 9.31 (p. 549). Recall that the researchers had 40 college
Die for full veneer crown. Refer to the Journal of International Society of Preventive Community Dentistry (Vol. 10, 2020) for the dimensional accuracy of veneer crowns, Exercise 9.80 (p. 587).
Corporate sustainability and firm characteristics. Refer to the Business and Society (March 2011) study on how firm size and firm type impact corporate sustainability behaviors, Exercise 9.7 (p.
Charisma of top-level leaders. Refer to the Academy of Management Journal (August 2015) study of the charisma of top leaders in business, Exercise 12.29 (p. 735). Recall that data were collected on
Highway traffic volume. A study in Transportation Engineering (Vol. 2, 2020) assessed the impact of snowfall and cold temperature on classified vehicle volume variation using five years of
Buy-side vs. sell-side analysts’ earnings forecasts. Refer to the Financial Analysts Journal (July/August 2008) comparison of earnings forecasts of buy-side and sell-side analysts, Exercise 2.86
Red meat and heart disease. Refer to the study presented at ESC Preventive Cardiology 2021 that explored the link between red meat and heart disease, Exercise 9.12 (p. 533). Recall that the study
Can money spent on gifts buy love? Refer to the Journal of Experimental Social Psychology (Vol. 45, 2009) study of whether buying gifts truly buys love, Exercise 9.9 (p. 533). Recall that study
Service robots in hotels. Refer to the Journal of Hospitality, Marketing & Management (January 2020) study of the quality of service robots in hotels, Exercise 9.44 (p. 557). Recall that the
Job market compensation. An article in Research in Economics (Vol. 74, 2020) showed that reflective accountants receive higher job compensation (wages) compared to their impulsive peers. One part
The following model was used to relate E1y2 to a single qualitative variable with four levels: E1y2 = b0 + b1x1 + b2x2 + b3x3 where x1 = e 1 0 if level 2 if not x2 = e 1 0 if level 3 if not x3 = e
The XLSTAT printout on the next page resulted from fitting the following model to n = 15 data points: y = b0 + b1x1 + b2x2 + e where x1 = e 1 0 if level 2 if not x2 = e 1 0 if level 3 if not *The
Write a regression model relating E1y2 to a qualitative independent variable that can assume three levels. Interpret all the terms in the model.
Electrical energy. A combined cycle power plant (CCPP) is composed of gas turbines, steam turbines, and heat recovery steam generators. In a CCPP, the electricity is ENRGY generated by gas and steam
Estimating repair and replacement costs of water pipes. Refer to the IHS Journal of Hydraulic Engineering (September 2012) study of the repair and replacement of water pipes, Exercise 11.21 (p. 658).
Failure times of silicon wafer microchips. Researchers at National Semiconductor experimented with tin-lead solder bumps used to manufacture silicon wafer integrated circuit chips. The failure times
Company donations to charity. The amount a company donates to a charitable organization is often restricted by financial inflexibility at the firm. One measure of financial inflexibility is the ratio
Disney World Marathon 2020. The runDisney events began in 1994 and have become massively popular since. Although 2020 presented some struggles and led to some changes, a brand-new marathon course
Shopping on Black Friday. The day after Thanksgiving— called Black Friday—is one of the largest shopping days in the United States. Winthrop University researchers conducted interviews with a
Business purchase decision. A study in the Journal of Business and Industrial Marketing (Vol. 35, 2020) developed and tested a theoretical framework to examine the congruency on the roles of values
Biofloc system. The biofloc technology (BFT) has recently gained attention as an economic and environmentally sustainable production system for aquatic species. In this system, bacteria convert
Commercial refrigeration systems. The role of maintenance in energy saving in commercial refrigeration was the topic of an article in the Journal of Quality in Maintenance Engineering (Vol. 18,
Tractor rollover protection. Refer to the Human Factors (February 2020) study of the incorrect usage of installed foldable rollover protection structures (FROPS) for tracFROPS tors, Exercise 11.23
Revenue vs cost. A paper published in the Asian Basic and Applied Research Journal (Vol. 2, 2020) examined the applicability of the Cost-Volume-Profit (CVP) model empirically for fifteen Indian sugar
Personality traits and job performance. When attempting to predict job performance using personality traits, researchers typically assume that the relationship is linear. A study published in the
StatCrunch was used to fit the complete second-order model E1y2 = b0 + b1x1 + b2x2 + b3x1x2 + b4x1 2 + b5x2 2 to n = 39 data points. The printout is shown belowa. Is there sufficient evidence to
Consider the following data that fit the quadratic model E1y2 = b0 + b1x + b2x2 : x y x y 0 8 4 5.2 1 7.3 5 6.5 2 5.6 6 8.8 3 5.9 7 12.1a. Construct a scatterplot for this data. Give the prediction
Suppose you fit the quadratic model E1y2 = b0 + b1x + b2x2 to a set of n = 20 data points and found R2 = .91, SSyy = 29.94, and SSE = 2.63.a. Is there sufficient evidence to indicate that the model
Suppose you fit the second-order model y = b0 + b1x + b2x2 + e to n = 25 data points. Your estimate of b2 is bn 2 = .47, and the estimated standard error of the estimate is .15.a. Test H0: b2 = 0
Write a second-order model relating the mean of y, E1y2, toa. one quantitative independent variableb. two quantitative independent variablesc. three quantitative independent variables [Hint: Include
Workplace envy and job performance. Refer to the Academy of Management Journal (August 2019) investigation of whether workplace envy has positive outcomes (e.g., seeking advice seeking from the
Arsenic in groundwater. Refer to the Environmental Science & Technology (January 2005) study of the reliability of a commercial kit to test for arsenic in groundwater, Exercise 12.16 (p. 728).
Bubble behavior in subcooled flow boiling. Refer to the Heat Transfer Engineering (Vol. 34, 2013) study of bubble behavior in subcooled flow boiling, Exercise 12.21 (p. 729). Recall that bubble
Service workers and customer relations. A study in Industrial Marketing Management (February 2016) investigated the impact of service workers’ (e.g., waiters and waitresses) personal resources on
Factors that impact an auditor’s judgment. A study was conducted to determine the effects of linguistic delivery style and client credibility on auditors’ judgments (Advances in Accounting and
Reality TV and cosmetic surgery. Refer to the Body Image: An International Journal of Research (March 2010) study of the impact of reality TV shows on a college student’s decision to undergo
Consumer behavior while waiting in line. The Journal of Consumer Research (November 2003) published a study of consumer behavior while waiting in a queue. A sample of n = 148 college students was
bn 1 = .18 bn 2 = -.05 bn 3 = .05 bn 4 = -.13 bn 5 = .07 bn 6 = .44 bn 7 = -.03 R2 = .29 F = 86.87 t = 7.22 t = -2.18 t = 3.41 t = -2.92 t = 2.69 t = 16.50 t = -1.28 (6.001) (6.001) (6.05) (6.001)
Defection from a service based on payment plan. Refer to the Journal of Marketing Research (October 2019) study on defection from a service plan, Exercise 8.20 (p. 470). Recall that 202 MBA students
Forecasting movie revenues with Twitter. Refer to the IEEE International Conference on Web Intelligence and Intelligent Agent Technology (2010) study on using the volume of chatter on Twitter.com to
Tipping behavior in restaurants. Can food servers increase their tips by complimenting the customers they are waiting on? To answer this question, researchers collected data on the customer tipping
The StatCrunch printout below was obtained from fitting the model y = b0 + b1x1 + b2x2 + b3x1x2 + e to n = 15 data points.a. What is the prediction equation?b. Give an estimate of the slope of the
Suppose you fit the interaction model y = b0 + b1x1 + b2x2 + b3x1x2 + e to n = 32 data points and obtain the following results: SSyy = 479 SSE = 21 bn 3 = 10 sbn3 = 4a. Find R2 and interpret its
Suppose the mean value E1y2 of a response y is related to the quantitative independent variables x1 and x2 E1y2 = 2 + x1 - 3x2 - x1x2a. Identify and interpret the slope for x2b. Plot the linear
Boiler drum production. In a production facility, an accurate estimate of man-hours needed to complete a task is required. A manufacturer of boiler drums used regression to predict the number of
Emotional intelligence and team performance. The Engineering Project Organizational Journal (Vol. 3, 2013) published the results of an exploratory study designed to gain a better understanding of how
Household energy expenditure. Refer to the analysis of the annual total household expenditure on energy from 2011 to 2020, Exercise 12.20 (p. 729). You fit a first-order multiple regression model to
Forest fire prediction and detection. Refer to the data collected for forest fire prediction and detection, Exercise 12.14 (p. 727). Multiple regression was used to model the fire weather index FWI
Arsenic in groundwater. Refer to the Environmental Science & Technology (Jan. 2005) study of the reliability of a commercial kit to test for arsenic in groundwater, Exercise 12.16 (p. 728). You fit a
Charisma of top-level leaders. Refer to the Academy of Management Journal (August 2015) study of whether the charisma of top leaders impacts performance, Exercise 11.28 (p. 661). Based on data

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