STATISTICS F/BUS.+ECON-W/ACCESS>CUSTOM<
18th Edition
ISBN: 9781323751503
Author: MCCLAVE
Publisher: PEARSON C
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 1, Problem 1.31ACI
Monitoring product quality. The Wallace Company of Houston is a distributor of pipes, valves, and fittings to the refining, chemical, and petrochemical industries. The company was a recent winner of the Malcolm Baldrige National Quality Award. One of the steps the company takes to monitor the quality of its distribution process is to send out a survey twice a year to a subset of its current customers, asking the customers to rate the speed of deliveries, the accuracy of invoices, and the quality of the packaging of the products they have received from Wallace.
- a. Describe the process studied.
- b. Describe the variables of interest.
- c. Describe the sample.
- d. Describe the inferences of interest.
- e. What are some of the factors that are likely to affect the reliability of the inferences?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Jensen Tire & Auto is in the process of deciding whether to purchase a maintenance contract for its new computer wheel alignment and balancing machine. Managers feel that maintenance expense should be related to usage, and they collected the following information on weekly usage (hours) and annual maintenance expense (in hundreds of dollars).
Mariah Jacobsen is the marketing manager at ABC Electronics, a major consumer electronics supplier in the northwest. Over the last five years, sales of the company's flagship product - the Wizer Anonymizer (the WA) - have been 45000, 45500, 44500, 46000 and 44000 units. This rate of sales is considered average for the product over the last twenty years or so. Ms. Jacobsen believes that the distribution of the WA's sales is normal with a standard deviation of 1500 units. If she were asked to make a forecast of next year's sales to upper management, what is the likelihood that she would be correct if she predicts sales between 43000 and 46000?
The accounting department of Insecurity Protection Services, a company that provides security services for
rich, famous, and insecure people is analyzing the costs of its accounting services. Analysts have selected
the following cost drivers: paychecks processed, invoices processed, customer accounts maintained,
responses to routine inquires, and special analyses.
MONTH
COSTS
PAYCHECKS
INVOICES
CUSTOMER
ROUTINE
SPECIAL
ACCOUNTS
325
PROCESSED
PROCESSED
INQUIRES
ANALYSIS
$7,013.00
6,469.80
6,129.40
5,905.90
5,659.50
1,340
1,180
1,050
1
12,690
11,980
10,950
10,280
9,020
8,130
7,540
6,980
32
2
310
39
3
280
245
205
185
45
1
4
930
54
840
68
6
780
83
5,115.80
5,101.80
5,488.90
5,284.80
2
7
700
160
97
3
8
630
140
112
4
9
8,930
680
115
101
2
Sort
9,800
10,560
11,560
10
760
93
5,538.40
6,129.30
6,026.10
6,517.20
6,600.50
120
11
890
175
82
1
12
1,070
1,240
1,390
1,450
200
68
13
11,710
12,460
13,520
13,620
169,730
240
55
14
285
45
15
7,153.10
7,207.60
$97,341.10
300
39
1
16
1,510
16,440
315
24…
Chapter 1 Solutions
STATISTICS F/BUS.+ECON-W/ACCESS>CUSTOM<
Ch. 1 - What is statistics?Ch. 1 - Explain the difference between descriptive and...Ch. 1 - List and define the four elements of a descriptive...Ch. 1 - List and define the five elements of an...Ch. 1 - List the three major methods of collecting data...Ch. 1 - Explain the difference between quantitative and...Ch. 1 - Explain how populations and variables differ.Ch. 1 - Explain how populations and samples differ.Ch. 1 - What is a representative sample? What is its...Ch. 1 - Why would a statistician consider an inference...
Ch. 1 - Explain the difference between a population and a...Ch. 1 - Define statistical thinking.Ch. 1 - Suppose youre given a data set that classifies...Ch. 1 - Suppose that a population contains 200,000...Ch. 1 - The Random Numbers applet generates a list of n...Ch. 1 - The Random Numbers applet can be used to select a...Ch. 1 - Applying the ConceptsBasic 1.15 Performance-based...Ch. 1 - Jamming attacks on wireless networks. Terrorists...Ch. 1 - Disaggregation of annually reported accounting...Ch. 1 - College application data. Colleges and...Ch. 1 - Opinion polls. Pollsters regularly conduct opinion...Ch. 1 - Cybersecurity survey. The information systems...Ch. 1 - Treasury deficit prior to the Civil War. In Civil...Ch. 1 - The lucky store effect in lottery ticket sales. In...Ch. 1 - Consumer recycling behavior. Under what conditions...Ch. 1 - Who is better at multi-tasking? In business,...Ch. 1 - Zillow.com estimates of home values. Zillow.com is...Ch. 1 - Drafting NFL quarterbacks. The National Football...Ch. 1 - The economic return to earning an MBA. What are...Ch. 1 - Corporate sustainability and firm characteristics....Ch. 1 - Inspection of highway bridges. All highway bridges...Ch. 1 - Structurally deficient highway bridges. Refer to...Ch. 1 - Monitoring product quality. The Wallace Company of...Ch. 1 - Guilt in decision making. The effect of guilt...Ch. 1 - Accounting and Machiavellianism. Behavioral...Ch. 1 - Can money spent on gifts buy love? Is the gift you...Ch. 1 - Random-digit dialing. To ascertain the...Ch. 1 - Current population survey. The employment status...Ch. 1 - Monitoring the production of soft-drink cans. The...Ch. 1 - Sampling TV markets for a court case. A recent...Ch. 1 - Critical Thinking Challenge 1.40 20/20 survey...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.Similar questions
- The average annual premium for automobile insurance in the US is $1503. The following annual premiums are representative of the website's findings for Michigan state. $1905, $2370, $2184, $2981, $2725, $2545, $2332, $2627, $2677, $2529, $3112, $2857, $2600, $2442, $2545, $2675, $2962, $2312, $2525, $2115 a) Provide a point estimate of the mean automobile insurance premium in Michigan. b) Develop a 95% confidence interval for the mean annual automobile insurance premium in Michigan. c) Does the 95% confidence interval for the annual automobile insurance premium in Michigan include the national average for the US? Interpret the relationship between auto insurance premiums in Michigan and the national average.arrow_forwardA regional bank issues different types of credit cards. As part of its annual review of the profitability of each type of credit card, the bank randomly samples 36 customers to measure the average quarterly charges per card. A random sample of 36 accounts from one type of credit card shows the accompanying spending per account (rounded to the nearest dollar). Complete parts a through e below. Data on Credit Card Spending: Credit Card Spending$2,373 $4,197 $3,711 $2,324 $2,782 $2,635$2,628 $2,968 $2,954 $2,550 $2,401 $1,363$1,797 $1,993 $2,539 $3,233 $2,855 $1,630 $2,169 $3,249 $3,428 $1,932 $3,067 $2,340$2,991 $2,245 $3,496 $2,697 $2,983 $3,138$1,600 $2,852 $2,739 $2,132 $2,885 $3,243 a. Based on these randomly sampled accounts, what is the best point estimate of the true mean quarterly spending for credit card account holders? $ (Round to the nearest cent as needed.)arrow_forwardJensen Tire & Auto is in the process of deciding whether to purchase a maintenance contract for its new computer wheel alignment and balancing machine. Managers feel that maintenance expense should be related to usage, and they collected the following information on weekly usage (hours) and annual maintenance expense (in hundreds of dollars). Weekly Usage(hours) AnnualMaintenanceExpense 13 17.0 10 22.0 20 30.0 28 37.0 32 47.0 17 30.5 24 32.5 31 39.0 40 51.5 38 40.0 test statistic is 6.90 Find the p-value. (Round your answer to three decimal places.) p-value = State your conclusion. Reject H0. We conclude that the relationship between weekly usage (hours) and annual maintenance expense (in hundreds of dollars) is significant. Do not reject H0. We conclude that the relationship between weekly usage (hours) and annual maintenance expense (in hundreds of dollars) is significant. Reject H0. We cannot conclude that the relationship between weekly usage…arrow_forward
- Prices and mileage of 30 Subaru Forester models within 50 miles of Columbus, Indiana are collected from Cargarus.com. Mileage ranged from 7,442 to 77,674 miles. Prices ranged from $25,560 to $29,990. Attached file.arrow_forwardThe billing department at a local hospital wants to improve its performance. After surveying its patients, they realized the main complaint was about billing errors. The management went back and reviewed their last year's bills. They took about 100 bills for each week of each month and checked for errors. See Excel file for data. Answer. a. Does the month of the year have an effect on the billing errors? b. What type of control chart would you should use? c. Is the billing process under statistical control? Use Minitab to support your answers.arrow_forwardA new brand of women clothes is to enter the Lebanese market. Like all other companies, this women's fashion company has a research team that is responsible for conducting a survey to collect and analyze information on the region and population in order to better understand their customers' characteristics, their profile, and their purchasing pattern. What type of research question is probably going to be used by the research team? Casual Exploratory Descriptive Exploratory and Casualarrow_forward
- Mid-West Publishing Company publishes college textbooks. The company operates an 800-telephone number whereby potential adopters can ask questions about forthcoming texts, request examination copies of texts, and place orders. Currently, two extension lines are used, with two representatives handling the telephone inquiries. Calls occurring when both extension lines are being used receive a busy signal; no waiting is allowed. Each representative can accommodate an average of 12 calls per hour. The arrival rate is 20 calls per hour. a. What percentage of calls receive a busy signal for the current telephone system with two extension lines? b. What percentage of calls are handled by the representative if the company has a telephone system with three extension lines? c. What is the average number of extension lines that will be busy if the company wants to handle 90% of the calls immediately? and What percentage of calls receive a busy signal if the company has additional two extension…arrow_forwardNas corporation's manager in the stamping department have been studying the overhead cost and the relatioship machine hours. Data from the most recent 12 months Month Overhead Machine hours January 5,030 2,730 February 1,600 600 March 7,210 3,403 April 4,560 2,200 May 6,880 3,411 June 6,520 2,586 July 6,230 3,364 August 5,570 2,411…arrow_forwarda. What is the lowest rating you should give to an "exemplary" employee if you follow the university's HR guidelines?arrow_forward
- The manager of Hudson Auto Repair would like to get a better picture of the distribution of costs for new parts used in the engine tune-up jobs done in the garage. A sample of 50 customer invoices for tune-ups has been taken and the costs of parts, rounded to the nearest dollar, are listed below. 91 78 93 57 75 52 99 80 73 62 71 69 72 89 66 75 79 75 72 76 104 74 62 68 97 105 77 65 80 109 85 97 88 68 83 68 71 69 67 74 62 82 98 101 79 105 79 69 62 73 Develop a frequency distribution for these cost data. Use your own judgment to determine the number of classes and class width that provide a distribution that will be meaningful and helpful to the manager. a. Develop a stem-and-leaf display showing both the rank order and shape of the data set. (3) b. Develop a stretched stem-and-leaf display using two stems for each leading digit(s). (2) c. Which display is better at revealing the natural grouping and variation in the data? (1)arrow_forwardListed in the table below are the selling prices, number of bedrooms, number of full baths, and above-ground square footage for 15 single-family residential homes that sold in Boulder, CO in January of 2011. 4 Sale Price # Bedrooms# Full baths $479,500 3 $394,100 3 $638,000 3 $745,900 $300,000 $1,366,600 $587,500 5 $399,000 3 $1,450,000 5 $275,200 2 $298,500 3 3 $1,269,000 $490,000 3 1026 4 3774 $1,700,000 5 2 $310,000 2 1760 Assuming the regression assumptions are met, perform the multiple regression of y = sale price on the set of predictor variables x₁ = number of bedrooms, x2 = number of full baths and x3 = above-ground square footage. Conduct the F test for the significance of overall regression and state your conclusion. Use a significance level of a = 0.05. 3 LO 5 1 1 2 2 1 3 2 1 2 1 1 3 Above-Ground Sq.Ft. 2 1222 1128 1204 4521 950 3536 1204 1070 5308 745 1026 2598 Select one: a. Since the p-value is approximately 0, there is evidence that a linear relationship exists between…arrow_forwardc. Use the summaries in parts (a) and (b) to describe the relationship between full- or part-time status and age. Write a brief summary of your conclusions.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- MATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons IncProbability and Statistics for Engineering and th...StatisticsISBN:9781305251809Author:Jay L. DevorePublisher:Cengage LearningStatistics for The Behavioral Sciences (MindTap C...StatisticsISBN:9781305504912Author:Frederick J Gravetter, Larry B. WallnauPublisher:Cengage Learning
- Elementary Statistics: Picturing the World (7th E...StatisticsISBN:9780134683416Author:Ron Larson, Betsy FarberPublisher:PEARSONThe Basic Practice of StatisticsStatisticsISBN:9781319042578Author:David S. Moore, William I. Notz, Michael A. FlignerPublisher:W. H. FreemanIntroduction to the Practice of StatisticsStatisticsISBN:9781319013387Author:David S. Moore, George P. McCabe, Bruce A. CraigPublisher:W. H. Freeman
MATLAB: An Introduction with Applications
Statistics
ISBN:9781119256830
Author:Amos Gilat
Publisher:John Wiley & Sons Inc
Probability and Statistics for Engineering and th...
Statistics
ISBN:9781305251809
Author:Jay L. Devore
Publisher:Cengage Learning
Statistics for The Behavioral Sciences (MindTap C...
Statistics
ISBN:9781305504912
Author:Frederick J Gravetter, Larry B. Wallnau
Publisher:Cengage Learning
Elementary Statistics: Picturing the World (7th E...
Statistics
ISBN:9780134683416
Author:Ron Larson, Betsy Farber
Publisher:PEARSON
The Basic Practice of Statistics
Statistics
ISBN:9781319042578
Author:David S. Moore, William I. Notz, Michael A. Fligner
Publisher:W. H. Freeman
Introduction to the Practice of Statistics
Statistics
ISBN:9781319013387
Author:David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:W. H. Freeman
What Are Research Ethics?; Author: HighSchoolScience101;https://www.youtube.com/watch?v=nX4c3V23DZI;License: Standard YouTube License, CC-BY
What is Ethics in Research - ethics in research (research ethics); Author: Chee-Onn Leong;https://www.youtube.com/watch?v=W8Vk0sXtMGU;License: Standard YouTube License, CC-BY