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Statistics For Business And Economics 13th Edition James T. McClave, P. George Benson, Terry Sincich - Solutions

Refer to the Chemical Engineering Research and Design (March 2013) study of a method of purifying nuclear fuel waste, Exercise 6.35. Recall that the process involves oxidation in molten salt and tends to produce oxygen bubbles with a rising velocity. To monitor the process, the researchers
Refer to the Journal of Marketing Research (December 2011) study of grocery store shoppers' judgments, Exercise 2.85. For one part of the study, 11 consumers were told to put their arm in a flex position (similar to carrying a shopping basket) and then each consumer was offered several choices
Refer to the Journal of Forest Engineering (July 1999) study of minimizing tractor skidding distances along a new road in a European forest, Exercise 6.37. The skidding distances (in meters) were measured at 20 randomly selected road sites. The data are repeated below. Recall that a logger working
Refer to the Journal of Petroleum Geology (April 2010) study of the environmental factors associated with biodegradation in crude oil reservoirs, Exercise 6.38. Recall that 16 water specimens were randomly selected from various locations in a reservoir on the floor of a mine and that the amount of
Polyester resins reinforced with fiberglass are used to fabricate wall panels of restaurants. It is theorized that adding cement kiln dust (CKD) to the polyester composite will increase wall panel hardness. In a study published in Advances in Applied Physics (Vol. 2, 2014), hardness (joules [J] per
Refer to the Nuclear Energy Institute's list of all states with active nuclear power plants, Exercise 2.54. The data on number of power plants per state are reproduced in the accompanying table. Note that states not listed have 0 active nuclear power plants. a. Compute the average number of power
The Occupational Safety and Health Act (OSHA) allows issuance of engineering standards to ensure safe workplaces for all Americans. The maximum allowable mean level of arsenic in smelters, herbicide production facilities, and other places where arsenic is used is .004 milligram per cubic meter of
Suppose the sample in Exercise 7.64 has produced p̂ = .83 and we wish to test H0: p = .9 against the alternative Ha: p < .9.a. Calculate the value of the z-statistic for this test.b. Note that the numerator of the z-statistic (p̂ - p0 = .83 - .90 = - .07) is the same as for Exercise 7.64.
A statistics student used a computer program to test the null hypothesis H0: p = .5 against the one-tailed alternative, Ha: p > .5. A sample of 500 observations are input into SPSS, which returns the following results: z = .44, two-tailed p-value = .33. a. The student concludes, based on the
Refer to Exercise 6.44, in which 50 consumers taste-tested a new snack food. Their responses (where 0 = do not like; 1 = like; 2 = indifferent) are reproduced below.a. Test H0: p = .5 against Ha: p > .5, where p is the proportion of customers who do not like the snack food. Use Î± = .10.b.
For the binomial sample sizes and null hypothesized values of p in each part, determine whether the sample size is large enough to use the normal approximation methodology presented in this section to conduct a test of the null hypothesis H0: p = p0.a. n = 900, p0 = .975b. n = 125, p0 = .01c. n =
Customers who participate in a store's free loyalty card program save money on their purchases, but allow the store to keep track of the customer's shopping habits and potentially sell these data to third parties. A Pew Internet & American Life Project Survey (January 2016) revealed that 225 of
If you test a hypothesis and reject the null hypothesis in favor of the alternative hypothesis, does your test prove that the alternative hypothesis is correct? Explain.
The opinions of employees at Asia-Pacific firms regarding fraud, bribery, and corruption in the workplace were elicited in the 2015 Asia- Pacific (APAC) Fraud Survey. Interviews were conducted with a sample 1,508 employees of large APAC companies. One question concerned whether or not the
"Streaming" of television programs is trending upward. According to The Harris Poll (August 26, 2013), over one-third of American's qualify as "subscription streamers," i.e., those who watch streamed TV programs through a subscription service such as Netflix, Hulu Plus, or Amazon Prime. The poll
Companies that produce candies typically offer different colors of their candies to provide consumers a choice. Presumably, the consumer will choose one color over another because of taste. Chance (Winter 2010) presented an experiment designed to test this taste theory. Students were blindfolded
Consumer Reports evaluated and rated 46 brands of toothpaste. One attribute examined in the study was whether or not a toothpaste brand carries an American Dental Association (ADA) seal verifying effective decay prevention. The data for the 46 brands (coded 1 = ADA seal, 0 = no ADA seal) are listed
The National Association of Realtors (NAR) reported the results of an April 2015 survey of home buyers. In a random sample of 1,971 residential properties purchased during the year, 414 were purchased as a vacation home. Five years ago, 10% of residential properties were vacation homes. a. Do the
Coffee markets that conform to organic standards focus on the environmental aspects of coffee growing, such as the use of shade trees and a reduced reliance on chemical pesticides. A study of organic coffee growers was published in Food Policy (Vol. 36, 2010). In a representative sample of 845
For safety reasons, calf dehorning has become a routine practice at dairy farms. A report by Europe's Standing Committee on the Food Chain and Animal Health (SANKO) stated that 80% of European dairy farms carry out calf dehorning. A later study, published in the Journal of Dairy Science (Vol. 94,
Pond's Age-Defying Complex, a cream with alpha hydroxy acid, advertised that it could reduce wrinkles and improve the skin. In a study published in Archives of Dermatology (June 1996), 33 middle-aged women used a cream with alpha hydroxy acid for 22 weeks. At the end of the study period, a
Motorcycle fatalities have increased dramatically over the past decade. As a result, manufacturers of powered two-wheelers (PTWs) are tweaking their design in order to improve visibility by automobile drivers. The factors that impact the visibility of PTWs on the road were investigated in Accident
According to Nielsen's Television Audience Report (2015), 29% of households in the $75,000 income bracket own a Smart TV with Internet and video streaming access. Develop a sampling plan that will allow you to test this claim. Identify the target population, experimental units, variable to be
For each of the following rejection regions, sketch the sampling distribution for z and indicate the location of the rejection region. a. z > 1.96 b. z > 1.645 c. z > 2.576 d. z < -1.282 e. z < -1.645 or z > 1.645 f. z < -2.576 or z > 2.576 g. For each of the rejection regions specified in parts
Refer to the Journal of Consumer Research (March 2003) experiment on influencing the choices of others by offering undesirable alternatives, Exercise 3.23 (p. 147). Recall that each of 124 college students selected three portable grills from five to display on the showroom floor. The students were
A random sample of n observations is selected from a normal population to test the null hypothesis that σ2 = 25. Specify the rejection region for each of the following combinations of Ha, α, and n:a. Ha: σ2 ≠ 25; α = .05; n = 16b. Ha: σ2 > 25; α = .01; n = 23c. Ha: σ2 > 25; α = .10;
Refer to Exercise 7.84. Suppose we had n = 100, x̅ = 9.4, and s2 = 4.84.a. Test the null hypothesis, H0: σ2 = 1, against the alternative hypothesis, Ha: σ2 > 1.b. Compare your test result with that of Exercise 7.84.
Refer to The Journal of Finance (April 2011) analysis of trading skills of institutional investors, Exercise 7.36 (p. 386). Recall that the study focused on "round-trip" trades, i.e., trades in which the same stock was both bought and sold in the same quarter. In a random sample of 200 round-trip
Refer to the Bulletin of Marine Science (April 2010) observational study of lobster trap placement by teams fishing for the red spiny lobster in Baja California Sur, Mexico, Exercise 7.54. Trapspacing measurements (in meters) for a sample of seven teams of red spiny lobster fishermen are repeated
Refer to Exercise 7.37 and the weights of tees produced by an injection mold process. If operating correctly, the process will produce tees with a weight variance of .000004 1ounces22. If the weight variance differs from .000004, the injection molder is out of control.a. Set up the null and
The Harris Poll (December 2013) conducted an online survey of American adults to determine their favorite sport. Your friend believes professional (National Football League [NFL]) football-with revenue of about $13 billion per year-is the favorite sport for 40% of American adults. Specify the null
Refer to the Journal of Food Engineering (September 2013) study of the characteristics of sweet potato chips fried at different temperatures, Exercise 6.97. Recall that a sample of 6 sweet potato slices were fried at 130° using a vacuum fryer, and the internal oil content (gigagrams [Gg]) was
An experiment was carried out to investigate the strength variability of pre-stressed, bonded concrete after anchorage failure has occurred, and the results were published in Engineering Structures (June 2013). The maximum strand force, measured in kilonewtons (kN), achieved after anchorage failure
Refer to the Journal of Applied Physics investigation of throughput jitter in the opening switch of a prototype water power system, Exercise 6.102. Recall that low throughput jitter is critical to successful waterline technology. An analysis of conduction time for a sample of 18 trials of the
The Journal of Small Business Management (Vol. 40, 2002) published a study of what motivates small firms to export. In a survey of 137 exporting firms, each CEO was asked to respond to the statement "Management believes that the firm can achieve economies of scale by exporting" on a scale of 1
a. List three factors that will increase the power of a test.b. What is the relationship between β, the probability of committing a Type II error, and the power of a test?
Suppose you want to test H0: μ = 500 against Ha: μ > 500 using α = .05. The population in question is normally distributed with standard deviation 100. A random sample of size n = 25 will be used.a. Sketch the sampling distribution of x, assuming that H0 is true.b. Find the value of x0, that
Refer to Exercise 7.97. Suppose you want to test H0: μ = 500 against Ha: μ > 500 using α = .05. The population in question is normally distributed with standard deviation 100. A random sample of size n = 25 will be used. a. If μ = 575 instead of 550, what is the probability that the hypothesis
It is desired to test H0: μ = 75 against Ha: μ < 75 using α = .10. The population in question is uniformly distributed with standard deviation 15. A random sample of size 49 will be drawn from the population.a. Describe the (approximate) sampling distribution of x̅ under the assumption that
Refer to the data for 308 diamonds saved in the file. Two quantitative variables in the data set are number of carats and selling price. One of the qualitative variables is the independent certification body that assessed each of the stones. Three certification bodies were used: GIA, IGI, and HRD.
A study examined children's recall and recognition of television advertisements (Journal of Advertising, Spring 2006). Two groups of children were shown a 60-second commercial for Sunkist FunFruit Rockn Roll Shapes. One group (the A/V group) was shown the ad with both audio and video; the second
Refer to the Economics of Education Review (Vol. 21, 2002) study of the relationship between education level and earnings, Exercise 7.46 (p. 388). A National Adult Literacy Survey revealed that males with a postgraduate degree had a sample mean salary of $61,340 (with standard error sxM = $2,185),
The speed with which consumers decide to purchase a product was investigated in the Journal of Consumer Research (August 2011). The researchers theorized that consumers with last names that begin with letters later in the alphabet will tend to acquire items faster than those whose last names begin
Human Factors (March 2014) published a study that examined the effect of shared leadership by the cockpit and cabin crews of a commercial airplane. Simulated flights were taken by 84 six-person crews, where each crew consisted of a two person cockpit (captain and first officer) and a four-person
Refer to the Journal of Business Logistics (Vol. 36, 2015) study of the factors that lead to successful performance-based logistics projects, Exercise 2.45 (p. 71). Recall that opinions of a sample of Department of Defense (DOD) employees and suppliers were solicited during interviews. Data on
Refer to Exercise 4.123 and the Analytical Chemistry (Dec. 15, 2009) study in which scientists used high-performance liquid chromatography to determine the amount of drug in a tablet. Twenty-five tablets were produced at each of two different, independent sites. Drug concentrations (measured as a
Taste-testers of new food products are presented with several competing food samples and asked to rate the taste of each on a 9-point scale (where 1 = "dislike extremely" and 9 = "like extremely"). In the Journal of Sensory Studies (June 2014), food scientists compared two different taste-testing
Independent random samples of 64 observations each are chosen from two normal populations with the following means and standard deviations: Population 1 _______________ Population 2 μ1 = 12 ............................... μ2 = 10 σ1 = 4 ................................. σ2 = 3 Let x̅1 and
Studies have established that rudeness in the workplace can lead to retaliatory and counterproductive behavior. However, there has been little research on how rude behaviors influence a victim's task performance. Such a study was conducted, with the results published in the Academy of Management
The gender diversity of a large corporation's board of directors was studied in Accounting & Finance (December 2015). In particular, the researchers wanted to know whether firms with a nominating committee would appoint more female directors than firms without a nominating committee. One of the
Refer to the Journal of Consumer Behaviour (Vol. 10, 2011) study of packaging of a children's health food product, Exercise 7.33. Recall that a fictitious brand of a healthy food product- sliced apples-was packaged to appeal to children. The researchers compared the appeal of this fictitious brand
The two most common marketing tools used for product advertising are ads on television and ads in a print magazine. Consumers' attitudes toward television and magazine advertising were investigated in the Journal of Advertising (Vol. 42, 2013). In one experiment, each in a sample of 159 college
The potential of using solar panels constructed above national highways to generate energy was explored in the International Journal of Energy and Environmental Engineering (December 2013). Two-layer solar panels (with 1 meter separating the panels) were constructed above sections of both east-west
To combat red-light-running crashes many states have installed red light cameras at dangerous intersections to photograph the license plates of vehicles that run the red light. How effective are photo-red enforcement programs in reducing red-light running crash incidents at intersections? The
Many companies now use text messaging on cell phones as a means of marketing their products. One way to do this is to send a redeemable discount coupon (called an m-coupon) via a text. The redemption rate of m-coupons-the proportion of coupons redeemed-was the subject of an article in the Journal
Refer to the Biomass and Energy (Vol. 36, 2012) study of the willingness of producers to supply biomass products such as surplus hay, Exercise 8.20 (p. 445). Recall that independent samples of Missouri producers and Illinois producers were surveyed. Another aspect of the study focused on the
Response rates to Web surveys are typically low, partially due to users starting but not finishing the survey. The factors that influence response rates were investigated in Survey Methodology (December 2013). In a designed study, Web users were directed to participate in one of several surveys
The Federal Highway Administration (FHWA) recently issued new guidelines for maintaining and replacing traffic signs. Civil engineers at North Carolina State University conducted a study of the effectiveness of various sign maintenance practices developed to adhere to the new guidelines and
More than 1 million heart patients each year undergo an angioplasty. The benefits of an angioplasty were challenged in a study of 2,287 patients (2007 Annual Conference of the American College of Cardiology, New Orleans). All the patients had substantial blockage of the arteries but were medically
When you sign on to your Facebook account, you are granted access to more than 1 million relying party (RP) Web sites. Vulnerabilities in this sign-on system may permit an attacker to gain unauthorized access to your profile, allowing the attacker to impersonate you on the RP Web site. Computer and
Refer to the Journal of Accounting Education (Vol. 25, 2007) study of providing homework assistance to accounting students, Exercise 8.18. Recall that one group of students was given a completed homework solution and another group was given only check figures at various steps of the solution. The
Refer to the Proceedings of the 5th AMC Workshop on Computers & Communication Security (October 2012) study of the vulnerability of relying party (RP) Web sites, Exercise 8.59 (p. 465). Recall that the Web sites were categorized as server-flow or client-flow Web sites. The researchers want to
Refer to the Human Factors (March 2014) study of shared leadership by the cockpit and cabin crews of a commercial airplane, Exercise 8.14. Recall that each crew was rated as working either successfully or unsuccessfully as a team. Then, during a simulated flight, the number of leadership functions
Independent random samples from normal populations produced the results shown in the next table. Sample 1 _______________Sample 2 1.2 .............................. 4.2 3.1 .............................. 2.7 1.7 .............................. 3.6 2.8 .............................. 3.9 3.0 a.
Refer to the International Journal of Energy and Environmental Engineering (December 2013) study of solar energy generation along highways, Exercise 8.39. Recall that the researchers compared the mean monthly amount of solar energy generated by east-west- and north-south- oriented solar panels
Refer to the study of patients with substantial blockage of the arteries presented at the 2007 Annual Conference of the American College of Cardiology, Exercise 8.56. Recall that half the patients were randomly assigned to get an angioplasty and half were not. The researchers compared the
Refer to the Journal of Transportation Engineering (June 2013) study of traffic sign maintenance in North Carolina, Exercise 8.54. Recall that the proportion of signs on NCDOT-maintained roads that fail minimum requirements was compared to the corresponding proportion for signs on county-owned
Given v1 and v2, find the following probabilities:a. v1 = 2, v2 = 30, P(F ≥ 5.39)b. v1 = 24, v2 = 10, P(F < 2.74)c. v1 = 7, v2 = 1, P(F ≤ 236.8)d. v1 = 40, v2 = 40, P(F > 2.11)
For each of the following cases, identify the rejection region that should be used to test H0: σ21 = σ22 against Ha: σ21 > σ22. Assume v1 = 30 and v2 = 20. a. α = .10 b. α = .05 c. α = .025 d. α = .01
Refer to the Journal of Business Logistics (Vol. 36, 2015) study of the factors that lead to successful performance-based logistics projects, Exercise 8.15. You used the data in the PBL file to test whether commercial suppliers have less experience, on average, than government employees. Due to
Refer to Exercise 8.16 and the Analytical Chemistry (Dec. 15, 2009) study in which scientists used high-performance liquid chromatography to determine the amount of drug in a tablet. Recall that 25 tablets were produced at each of two different, independent sites. The researchers want to determine
Refer to the Journal of Consumer Research (August 2011) study of the last name effect in acquisition timing, Exercise 8.13. Recall that the mean response times (in minutes) to acquire free tickets were compared for two groups of MBA students-those students with last names beginning with one of the
Refer to the Journal of Food Engineering (September 2013) study of the characteristics of fried sweet potato chips, Exercise 7.90 (p. 407). Recall that a sample of 6 sweet potato slices fried at 130° using a vacuum fryer yielded the following statistics on internal oil content (measured in
Refer to the Journal of Marketing Research (December 2011) study of shopping cart design, Exercise 2.85. Recall that design engineers want to know whether the mean choice of vice-over-virtue score is higher when a consumer's arm is flexed (as when carrying a shopping basket) than when the
Refer to the Marine Technology (Jan. 1995) study of major oil spills from tankers and carriers, Exercise 2.159 (p. 120). The data for the 42 recent spills are saved in the accompanying file.a. Construct a 90% confidence interval for the difference between the mean spillage amount of accidents
The U.S. Department of Education (DOE) conducted a national study of the effectiveness of educational software. In one phase of the study, a sample of 1,516 first-grade students in classrooms that used educational software was compared with a sample of 1,103 first-grade students in classrooms that
The Teaching of Psychology (August 1998) published a study of whether a practice test helps students prepare for a final exam. Undergraduate students were grouped according to their class standing and whether they attended a review session or took a practice test prior to the final exam. The
Polycyclic aromatic hydrocarbons (PAHs)-formed during the incomplete burning of oil, gas, or coal-are considered to be potential dangerous pollutants by the Environmental Protection Agency (EPA). Consider an actual developer who purchased a large parcel of land in Florida that he planned to turn
Refer to Exercise 9.10. In addition to the factor, Type of advertisement (within-store price promotion and between-store price promotion), the researchers also investigated the impact of a second factor-Location where ad is read (at home or in the store). About half of the consumers who were
Livestock that are transported long distances for slaughter or market often lose weight due to stress. The Animal Science Journal (May 2014) investigated the use of ascorbic acid (AA) to reduce the stress in goats during transportation. Twenty-four healthy Boer goats were randomly divided into four
In business, a group of executives is often assigned to make key decisions. The American Journal of Political Science (April 2014) published a study on a woman's impact on mixed-gender deliberating groups. The researchers randomly assigned subjects to one of several 5-member decision-making groups.
Refer to Exercise 9.17. Conduct a two-sample t-test (Section 8.2) of the null hypothesis that the two treatment means are equal for each dot plot. Use a = .05 and two tailed tests. In the course of the test, compare each of the following with the F-tests in Exercise 9.17: a. The pooled variances
Refer to Exercises 9.17 and 9.18. Complete the following ANOVA table for each of the two dot plots:
Can Twitter be used to enhance student learning and engagement in a university classroom? This was the question of interest in a study published in the Journal of Marketing Education (December 2015). A sample of 411 undergraduate students enrolled in either a first-year marketing or fashion course
Flexography is a printing process used in the packaging industry. The process is popular, since it is cost-effective and can be used to print on a variety of surfaces (e.g., paperboard, foil, and plastic). A study was conducted to determine if flexography exposure time has an impact on the quality
Refer to the Journal of Accounting Education (Vol. 25, 2007) study of assisting accounting students with their homework, Exercise 8.18 (p. 444). A total of 75 junior-level accounting majors who were enrolled in Intermediate Financial Accounting participated in the experiment. Recall that students
Long-haul truck drivers are often asked to drive while fatigued. Can a secondary task-such as a word association task-improve the performance of a fatigued driver? This was the question of interest in a Human Factors (May 2014) study. The researchers used a driving simulator to obtain their data.
Pediatric researchers carried out a designed study to test whether a teaspoon of honey before bed calms a child's cough and published their results in Archives of Pediatrics and Adolescent Medicine (December 2007). (This experiment was first described in Exercise 2.31, p. 62.) A sample of 105
Successful marketing of professional sports franchises involves finding sponsors that appeal to the team's fans. The Journal of Marketing Research (October 2015) published a study that investigated the impact of banning a controversial sponsor (e.g., one that manufactures an alcoholic beverage) on
Consider a completely randomized design with five treatments, A, B, C, D, and E. The ANOVA F-test revealed significant differences among the means. A multiple comparisons procedure was used to compare all possible pairs of treatment means at a = .05. The ranking of the five treatment means is
A multiple comparison procedure for comparing four treatment means produced the confidence intervals shown here. Rank the means from smallest to largest. Which means are significantly different?(μ1) - μ2): (2, 15)(μ1) - μ3): (4, 7)(μ1) - μ4): (-10, 3)(μ2) - μ3): (-5, 11)(μ2) - μ4): (-12,
Refer to the Journal of Graphic Engineering and Design (Vol. 3, 2012) study of the quality of flexography printing, Exercise 9.24 (p. 520). Recall that four different exposure times were studied-8, 10, 12, and 14 minutes-and that the measure of print quality used was dot area (hundreds of dots per
Due to its unique stretch ability, mozzarella is the most commonly used pizza cheese by pizzerias. How do the baking properties of mozzarella compare with those of other pizza cheese options? This was the question of interest in a study published in the Journal of Food Science (August 2014). Seven
Refer to the Journal of Economic Psychology (Sep. 2008) study on high-stakes insurance decisions, Exercise 9.26 (p. 520). A second experiment involved only the group 2 subjects. In part A of the experiment, these 84 subjects were informed of the hazards (both fire and theft) of owning a valuable
The potential of solar panels on roofs built above national highways as a source of solar energy was investigated in the International Journal of Energy and Environmental Engineering(December, 2013). Computer simulation was used to estimate the monthly solar energy (kilowatt-hours) generated from
Before marketing a new food product, companies evaluate the palatability of the food item using a numerical taste test scale. For example, the Hedonic 9-point scale uses the following ratings: 1 = dislike extremely, 2 = dislike very much, 3 = dislike moderately, 4 = dislike slightly, 5 = neither
Plant therapists believe that plants can reduce on-the-job stress. A Kansas State University study was conducted to investigate this phenomenon. Two weeks prior to final exams, 10 undergraduate students took part in an experiment to determine what effect the presence of a live plant, a photo of a
Facial similarity to previously encountered persons can be a potential source of bias in decision making. For example, in a job interview, the interviewer should judge the job candidate solely on his or her qualifications, not on whether the candidate looks similar to a previously rejected
Refer to the Business and Society (March 2011) study on how firm size and firm type impact corporate sustainability behaviors, Exercise 1.28 (p. 27). Certified Public Accountants (CPAs) were surveyed on their firms' likelihood of reporting sustainability policies (measured as a probability between
An article in Industrial Marketing Management (January 2016) investigated the dynamics of the buyer-seller relationship-in particular, the relationship between a large software development company (the seller) and a large mobile telecommunications firm (the buyer). On the basis of interviews with

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