Statistics For Management And Economics 9th Edition Gerald Keller, Kenneth C Louden - Solutions

Unlock the wealth of knowledge with "Statistics For Management And Economics 9th Edition" by Gerald Keller and Kenneth C Louden. Discover comprehensive solutions with our online answers key, providing you step-by-step guidance to solved problems. Access the solution manual, solutions pdf, and instructor manual to further enhance your understanding. Dive into the textbook's questions and answers, complete with chapter solutions and a test bank for thorough preparation. Whether you're searching for free downloads or precise step-by-step answers, our resources are designed to support your educational journey and mastery of statistics.

Elevator passenger arrivals. A study of the arrival process of people using elevators at a multilevel office building was conducted and the results reported in Building Services Engineering Research and Technology (Oct. 2012). Suppose that at one particular time of day, elevator passengers arrive
Given that x is a hypergeometric random variable with N = 7, n = 3, and r = 4, compute the following:a. P1x = 12b. P1x = 02c. P1x = 32d. P1x = 42
Given that x is a hypergeometric random variable, compute p1x2 for each of the following cases:a. N = 6, n = 4, r = 4, x = 2b. N = 10, n = 6, r = 4, x = 4c. N = 3, n = 3, r = 3, x = 3d. N = 5, n = 3, r = 3, x = 1
Given that x is a hypergeometric random variable with N = 5, n = 3, and r = 2:a. Display the probability distribution for x in tabular form.b. Compute m and s for x.c. Graph p1x2, and locate m and the interval m { 2s on the graph.d. What is the probability that x will fall within the interval m {
Given that x is a hyper-geometric random variable with N = 10, n = 6, and r = 4, find the following probabilities:a. P1x = 12b. P1x = 32c. P1x … 32d. P1x Ú 32e. P1x 6 22f. P1x Ú 52
Given that x is a hypergeometric random variable with N = 6, n = 3, and r = 2:a. Display the probability distribution for x in tabular form.b. Compute the mean and variance of x.c. Graph p1x2, and locate m and the interval m { 2s on the graph.d. What is the probability that x will fall within the
Do social robots walk or roll? Refer to the International Conference on Social Robotics (Vol. 6414, 2010) study of the trend in the design of social robots, Exercise 4.25(p. 221). The study found that of 106 social robots, 63 were built with legs only, 20 with wheels only, 8 with both legs and
ESL students and plagiarism. Refer to the Journal of Education and Human Development (Vol. 3, 2009) investigation of plagiarism among English-as-a-second-language(ESL) students, Exercise 3.30(p. 159). Recall that of six ESL students taking a master’s course in linguistics, three admitted to
On-site treatment of hazardous waste. The Resource Conservation and Recovery Act mandates the tracking and disposal of hazardous waste produced at U.S. facilities.Professional Geographer (Feb. 2000) reported the hazardous-waste generation and disposal characteristics of 209 facilities. Only 8 of
Guilt in decision making. Refer to the Journal of Behavioral Decision Making (Jan. 2007) study of how guilty feelings impact decisions, Exercise 3.59(p. 170). Recall that 57 students were assigned to a guilty state through a reading/writing task. Immediately after the task, the students were
Contaminated gun cartridges. Refer to the investigation of contaminated gun cartridges at a weapons manufacturer presented in Exercise 4.33(p. 222). In a sample of 160 cartridges from a certain lot, 36 were found to be contaminated and 124 were “clean.” If you randomly select 7 of these 160
Lot inspection sampling. Imagine that you are purchasing small lots of a manufactured product. If it is very costly to test a single item, it may be desirable to test a sample of items from the lot instead of testing every item in the lot.Suppose each lot contains 15 items. You decide to sample 8
Museum management. Refer to the Museum Management and Curatorship (June 2010) study of the criteria used to evaluate museum performance, Exercise 3.28(p. 159). Recall that the managers of 30 leading museums of contemporary art were asked to provide the performance measure used most often. Of these
Cell phone handoff behavior. Refer to the Journal of Engineering, Computing and Architecture (Vol. 3., 2009)study of cell phone handoff behavior, Exercise 3.62(p. 171).Recall that a “handoff” describes the process of a cell phone moving from one base channel (identified by a color code)to
Gender discrimination suit. The Journal of Business &Economic Statistics (July 2000) presented a case in which a charge of gender discrimination was filed against the U.S.Postal Service. At the time, there were 302 U.S. Postal Service employees (229 men and 73 women) who applied for promotion. Of
Awarding of home improvement grants. A community development agency makes home improvement grants each year to homeowners in depressed city neighborhoods. One year, grants were awarded by the city council via a “random selection”of 142 homeowners’ applications from among a total of 750
Which of the following describe discrete random variables, and which describe continuous random variables?a. The heights of rubber plantsb. The number of second-hand cars on salec. The number of flats decorated by an interior designerd. The number of non-vegetarian guests in a party
For each of the following examples, decide whether x is a binomial random variable and explain your decision:a. A manufacturer of computer chips randomly selects 200 chips from each hour’s production in order to estimate the proportion of defectives. Let x represent the number of defectives in
Given that x is a hypergeometric random variable, compute p1x2 for each of the following cases:a. N = 9, n = 5, r = 4, x = 0b. N = 10, n = 6, r = 4, x = 3c. N = 6, n = 3, r = 4, x = 3
Suppose x is a binomial random variable. Find p1x2 for each of the following combinations of x, n, and p:a. x = 1, n = 4, p = .2b. x = 4, n = 21, p = .4c. x = 0, n = 4, p = .5d. x = 4, n = 6, p = .6e. n = 16, x = 12, p = .8f. n = 12, x = 8, p = .7
Parents who condone spanking. According to a nationwide survey, 60% of parents with young children condone spanking their child as a regular form of punishment (Tampa Tribune, Oct. 5, 2000). Consider a random sample of four people, each of whom is a parent with young children.Assume that x, the
Tracking missiles with satellite imagery. The Space-Based Infrared System (SBIRS) uses satellite imagery to detect and track missiles (Chance, Summer 2005). The probability that an intruding object (e.g., a missile) will be detected on a flight track by SBIRS is .8. Consider a sample of 20
Emergency rescue vehicle use. An emergency rescue vehicle is used an average of 1.4 times daily. Use the Poisson distribution to finda. The probability that the vehicle will be used exactly twice tomorrowb. The probability that the vehicle will be used more than twicec. The probability that the
Married-women study. According to Women’s Day magazine(Jan. 2007), 50% of married women would marry their current husbands again if given the chance. Consider the number x in a random sample of 12 married women who would marry their husbands again. Identify the discrete probability distribution
Deep-draft vessel casualties. Economists at the University of New Mexico modeled the number of casualties (deaths or missing persons) experienced by a deep-draft U.S.flag vessel over a three-year period as a Poisson random variable x. The researchers estimated E1x2 to be .03a. Find the variance of
Belief in an afterlife. A national poll conducted by The New York Times (May 7, 2000) revealed that 80% of Americans believe that after you die, some part of you lives on, either in a next life on earth or in heaven. Consider a random sample of 12 Americans and count x, the number who believe in
Extinct New Zealand birds. Refer to the Evolutionary Ecology Research (July 2003) study of the patterns of extinction in the New Zealand bird population, presented in Exercise 3.95(p.185). Of the 132 bird species in the popu lation, 38 are extinct.Suppose you randomly select 10 of the 132 bird
Student gambling on sports. A study of gambling activity at the University of West Georgia (UWG) discovered that 60% of the male students wagered on sports the previous year (The Sport Journal, Fall 2006). Consider a random sample of 50 UWG male students. How many of these students would you expect
Parents’ behavior at a gym meet. Pediatric Exercise Science(Feb. 1995) published an article on the behavior of parents at competitive youth gymnastic meets. On the basis of a survey of the gymnasts, the researchers estimated the probability of a parent “yelling” at his or her child before,
Vinyl chloride emissions. The Environmental Protection Agency (EPA) limits the amount of vinyl chloride in plant air emissions to no more than 10 parts per million. Suppose the mean emission of vinyl chloride for a particular plant is 5 parts per million. Assume that the number x of parts per
Countries that allow a free press. The degree to which democratic and nondemocratic countries attempt to control the news media was examined in the Journal of Peace Research (Nov. 1997). The article reported that 80% of all democratic regimes allow a free press. In contrast, 10% of all
Chickens with fecal contamination. The United States Department of Agriculture (USDA) reports that, under its standard inspection system, one in every 100 slaughtered chickens passes inspection for fecal contamination.In Exercise 3.21(p. 158), you found the probability that a randomly selected
Crime Watch neighborhood. In many cities, neighborhooda. Use the Poisson distribution to calculate the probability that 2 or fewer crimes are committed in a year, assuming that the average number is still 8 crimes per year.b. Do you think this event provides some evidence that the Crime Watch group
Network forensic analysis. A network forensic analyst is responsible for identifying worms, viruses, and infected nodes in the computer network. A new methodology for finding patterns in data that signify infections was investigated in IEEE Transactions on Information Forensics and Security (May
How many questionnaires to mail? The probability that a person responds to a mailed questionnaire is .4. How many questionnaires should be mailed if you want to be reasonably certain that at least 100 will be returned?
Reliability of a “one-shot” device. A “one-shot” device can be used only once; after use, the device (e.g., a nuclear weapon, space shuttle, automobile air bag) either is destroyed or must be rebuilt. The destructive nature of a one-shot device makes repeated testing either impractical or
Emergency room bed availability. The mean number of patients admitted per day to the emergency room of a small hospital is 2.7. If, on a given day, there are only four beds available for new patients, what is the probability that the hospital will not have enough beds to accommodate its newly
Space shuttle disaster. On January 28, 1986, the space shuttle Challenger exploded, killing all seven astronauts aboard. An investigation concluded that the explosion was caused by the failure of the O ring seal in the joint between the two lower segments of the right solid rocket booster. In a
Introduce the field of statistics (1.1)
Demonstrate how statistics applies to real-world problems (1.2)
Introduce the language of statistics and the key elements to any statistical problem (1.3)
Differentiate between population and sample data (1.3)
Differentiate between descriptive and inferential statistics (1.3)
Identify the different types of data and data collection methods (1.4–1.5)
Discover how critical thinking through statistics can help improve our quantitative literacy (1.6)
What is sampling?
A statistics practitioner calculated the following statistics:Treatment Statistic 1 2 3 n 5 5 5 10 15 20 s2 50 50 50a. Complete the ANOVA table.b. Repeat part (a) changing the sample sizes to 10 each.c. Describe what happens to the F-statistic when the sample sizes increase.
You are given the following statistics:Treatment Statistic 1 2 3 n 4 4 4 20 22 25 s2 10 10 10a. Complete the ANOVA table.b. Repeat part (a) changing the variances to 25 each.c. Describe the effect on the F-statistic of increasing the sample variances.
The following statistics were calculated:Treatment Statistic 1 2 3 4 n 10 14 11 18 30 35 33 40 s2 10 10 10 10a. Complete the ANOVA table.b. Repeat part (a) changing the sample means to 130, 135, 133, and 140.x xxc. Describe the effect on the F-statistic of increasing the sample means by
Xr14-04 How does an MBA major affect the number of job offers received? An MBA student randomly sampled four recent graduates, one each in finance, marketing, and management, and asked them to report the number of job offers. Can we conclude at the 5% significance level that there are differences
Xr14-05 A consumer organization was concerned about the differences between the advertised sizes of containers and the actual amount of product. In a preliminary study, six packages of three different brands of margarine that are supposed to contain 500 ml were measured. The differences from 500 ml
Xr14-06 Many college and university students obtain summer jobs. A statistics professor wanted to determine whether students in different degree programs earn different amounts. A random sample of 5 students in the BA, BSc, and BBA programs were asked to report what they earned the previous
Xr14-07 Spam is the price we pay for being able to easily communicate by e-mail. Does spam affect everyone equally? In a preliminary study, university professors, administrators, and students were randomly sampled. Each person was asked to count the number of spam messages received that day. The
Xr14-08 A management scientist believes that one way of judging whether a computer came equipped with enough memory is to determine the age of the computer. In a preliminary study, random samples of computer users were asked to identify the brand of computer and its age (in months). The categorized
Xr14-11 Are proficiency test scores affected by the education of the child’s parents? (Proficiency tests are administered to a sample of students in private and public schools. Test scores can range from 0 to 500.) To answer this question, a random sample of 9-year-old children was drawn. Each
GSS2002* GSS2004* GSS2006* GSS2008* Have educational levels kept uniform over the years 2002, 2004, 2006, and 2008? Conduct a test to determine whether the number of years of education (EDUC) differ in the four years.
GSS2008* Television networks and their advertisers are constantly measuring viewers to determine their likes and dislikes and how much time adults spend watching television per day. Do the data from the General Social Survey in 2008 allow us to infer that the amount of television (TVHOURS) differs
GSS2008* How are income and degree related? The General Social Survey asked respondents to identify the highest degree completed (DEGREE: 0 Left high school, 1 High school, 2 Junior college, 3 Bachelor’s degree, 4 Graduate degree). Is there enough statistical evidence to conclude that
GSS2002* GSS2004* GSS2006* GSS2008* Has the amount of time Americans devote to work weekly (HRS)changed over the years 2002, 2004, 2006, and 2008?Perform a statistical analysis to answer the question.
GSS2008* Who earns more money: married people, single people, widows and widowers, or divorcees?Conduct an appropriate statistical technique to determine whether there is enough evidence to conclude that incomes (INCOME) vary by marital status(MARITAL).
GSS2002* GSS2004* GSS2006* GSS2008* Has the amount of television American adults watch been constant over the years 2002, 2004, 2006, and 2008, or has the amount varied? Test to determine whether the number of hours of television per day (TVHOURS)changed over the 8-year span.
ANES2008* Repeat the chapter-opening example using the data from the American National Election Survey of 2008. Test to determine whether annual incomes (INCOME) differ between the seven political views (LIBCON).
ANES2008* Who has the most and least education among Democrats, Independents, and Republicans?Conduct a statistical test to determine if there is evidence of a difference in education (EDUC) between the three political affiliations (PARTY3).
ANES2008* Who reads newspapers more: Democrats, Independents, or Republicans? Test to determine whether differences exist in the number of days reading a newspaper (DAYS9) between the three political affiliations (PARTY3).
ANES2008* How are income and degree related? The American National Election Survey asked respondents who reported at least 13 years of education to identify the highest degree completed (DEGREE:0 No degree earned; 1 Bachelor’s degree; 2 Master’s degree; 3 PhD, etc.; 4 LLB, JD; 5 MD,
ANES2008* Are marital status and education related? If so, we would expect that the amount of education in at least two of the marital status categories to be different.Conduct a statistical procedure to determine whether there is enough evidence to infer that the amount of education (EDUC) differs
ANES2008* How definite is one’s intention to vote in the presidential election, and is that intention related to party affiliation? To answer this question, conduct a test to determine whether the intention to vote (DEFINITE) varies between Democrats, Independents, and Republicans(PARTY3).
a. Use Fisher’s LSD method with .05 to determine which population means differ in the following problem.k 3 n1 10 n2 10 n3 10 MSE 700b. Repeat part (a) using the Bonferroni adjustment.c. Repeat part (a) using Tukey’s multiple comparison method.
a. Use Fisher’s LSD procedure with .05 to determine which population means differ given the following statistics:k 5 n1 5 n2 5 n3 5 MSE 125 n4 5 n5 5b. Repeat part (a) using the Bonferroni adjustment.c. Repeat part (a) using Tukey’s multiple comparison method.
Refer to Exercise 14.6.a. Employ Fisher’s LSD method to determine which degrees differ (use .10).b. Repeat part (a) using the Bonferroni adjustment.
Xr14-09a. Apply Fisher’s LSD method with the Bonferroni adjustment to determine which schools differ in Exercise 14.9.b. Repeat part (a) applying Tukey’s method instead.
Xr14-10a. Apply Tukey’s multiple comparison method to determine which forms differ in Exercise 14.10.b. Repeat part (a) applying the Bonferroni adjustment.
Xr14-12 Refer to Exercise 14.12.a. Apply Fisher’s LSD method with the Bonferroni adjustment to determine which lacquers differ.b. Repeat part (a) applying Tukey’s method instead.
Xr14-14a. Apply Tukey’s multiple comparison method to determine which fertilizers differ in Exercise 14.14.b. Repeat part (a) applying the Bonferroni adjustment.
GSS2002* GSS2004* GSS2006* GSS2008* Refer to Exercise 14.21. Use an appropriate statistical technique to determine which years differ with respect to the amount of education (EDUC).
GSS2008* Refer to Exercise 14.22. Use Tukey’s multiple comparison method to determine which races differ in the amount of television watched(TVHOURS).
GSS2008* Refer to Exercise 14.23. Use a suitable multiple comparison method to determine which degrees differ in annual incomes (INCOME).
GSS2008* Refer to Exercise 14.25. Apply a suitable multiple comparison method to determine which categories of marital status differ.
ANES2008* Refer to Exercise 14.27. Apply Tukey’s multiple comparison method to determine which positions on the liberal–conservative spectrum(LIBCON) differ with respect to income (INCOME).
ANES2008* Refer to Exercise 14.28. Use a multiple comparison method to determine which of the three parties (PARTY3) differ with respect to education(EDUC).
ANES2008* Refer to Exercise 14.31. Use Tukey’s multiple comparison method to find which categories of marital status (MARITAL) differ with respect to education (EDUC).
ANES2008* Refer to Exercise 14.32. Use an appropriate multiple comparison method to determine which of the three parties (PARTY3) differ with respect to intention to vote (DEFINITE).
Xr14-55a. Assuming that the data shown here were generated from a randomized block experiment, calculate SS(Total), SST, SSB, and SSE.b. Assuming that the data below were generated from a one-way (independent samples) experiment, calculate SS(Total), SST, and SSE.c. Why does SS(Total) remain the
Xr14-56a. Calculate SS(Total), SST, SSB, and SSE, assuming that the accompanying data were generated from a randomized block experiment.b. Calculate SS(Total), SST, and SSE, assuming that the data below were generated from a oneway(independent samples) experiment.c. Explain why SS(Total) remains
Xr14-57 As an experiment to understand measurement error, a statistics professor asks four students to measure the height of the professor, a male student, and a female student. The differences (in centimeters)between the correct dimension and the ones produced by the students are listed here. Can
Xr14-58 How well do diets work? In a preliminary study, 20 people who were more than 50 pounds overweight were recruited to compare four diets.The people were matched by age. The oldest four became block 1, the next oldest four became block 2, and so on. The number of pounds that each person lost
Xr14-59 In recent years, lack of confidence in the U.S. Postal Service has led many companies to send all of their correspondence by private courier. A large company is in the process of selecting one of 3 possible couriers to act as its sole delivery method.To help in making the decision, an
Xr14-60 Refer to Exercise 14.14. Despite failing to show that differences in the three types of fertilizer exist, the scientist continued to believe that there were differences, and that the differences were masked by the variation between the plots of land.Accordingly, she conducted another
Xr14-64 Do medical specialists differ in the amount of time they devote to patient care? To answer this question, a statistics practitioner organized a study.The numbers of hours of patient care per week were recorded for five specialists. The experimental design was randomized blocks. The
ANES2008* Is there sufficient evidence to infer that there are differences between the number of days Americans watch national news on television (DAYS1), watch local television news in the afternoon or early evening(DAYS2), watch local television news in the late evening(DAYS3), and read a daily
ANES2004* Repeat Exercise 14.66 for 2004.
A two-factor analysis of variance experiment was performed with a 3, b 4, and r 20. The following sums of squares were computed:SS(Total) 42,450 SS(A) 1,560 SS(B) 2,880 SS(AB) 7,605a. Determine the one-way ANOVA table.b. Test at the 1% significance level to determine whether
Xr14-70 The following data were generated from a 2 2 factorial experiment with three replicates:Factor B Factor A 1 2 1 6 12 9 10 7 11 2 9 15 10 14 5 10a. Test at the 5% significance level to determine whether factors A and B interact.b. Test at the 5% significance level to determine whether
Xr14-71 The data shown here were taken from a 2 3 factorial experiment with four replicates:Factor B Factor A 1 2 1 23 20 18 17 17 16 20 19 2 27 29 23 23 21 27 28 25 3 23 27 21 19 24 20 16 22a. Test at the 5% significance level to determine whether factors A and B interact.b. Test at the 5%
Xr14-72 Refer to Example 14.4. We’ve revised the data by adding 2 to each of the numbers of the men.What do these data tell you?
Xr14-73 Refer to Example 14.4. We’ve altered the data by subtracting 4 from the numbers of treatment 8. What do these data tell you?Applications The following exercises require the use of a computer and software.
Draw diagrams representing what happens to the sampling distribution of a consistent estimator when the sample size increases. LO-1
a. From the information given here determine the 95% confidence interval estimate of the population mean.b. Repeat part (a) with .c. Repeat part (a) with .d. Describe what happens to the width of the confidence interval estimate when the sample mean increases.
a. A random sample of 100 observations was randomly drawn from a population with a standard deviation of 5. The sample mean was calculated as . Estimate the population mean with 99% confidence.b. Repeat part (a) with .c. Repeat part (a) with .d. Describe what happens to the width of the confidence
Is the sample median a consistent estimator of the population mean? Explain. LO-1

Showing 4000 - 4100 of 8575

First
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Last

Statistics For Management And Economics 9th Edition Gerald Keller, Kenneth C Louden - Solutions

Step by Step Answers