Concept explainers
Evaluating the performance of quality inspectors. The performance of quality inspectors affects both the quality of outgoing products and the cost of the products. A product that passes inspection is assumed to meet quality standards; a product that fails inspection may be reworked, scrapped, or reinspected. Quality engineers at an electric company evaluated performances of inspectors in judging the quality of solder joints by comparing each inspector's classifications of a set of 153 joints with the consensus evaluation of a panel of experts. The results for a particular inspector are shown in the table. One of the 153 solder joints was selected at random.
- a. What is the
probability that the inspector judged the joint to be acceptable? That the committee judged the joint to be acceptable? - b. What is the probability that both the inspector and the committee judged the joint to be acceptable? That neither judged the joint to be acceptable?
- c. What is the probability that the inspector and the committee disagreed? Agreed?
Want to see the full answer?
Check out a sample textbook solutionChapter 3 Solutions
EP STATISTICS F/BUS.+ECON.-ACCESS 18 WK
Additional Math Textbook Solutions
An Introduction to Mathematical Statistics and Its Applications (6th Edition)
Introductory Statistics
Elementary Statistics ( 3rd International Edition ) Isbn:9781260092561
Business Statistics: A First Course (7th Edition)
Elementary Statistics (13th Edition)
Stats: Modeling the World Nasta Edition Grades 9-12
- Over a nine-month period, OutdoorgearLab tested hardshell jackets designed for iceclimbing, mountaineering, and backpacking. Based on the breathability, durability, versatility, features, mobility, and weight of each jacket, an overall rating ranging from 0(lowest) to 100 (highest) was assigned to each jacket tested. The following data show theresults for 20 top-of-the-line jackets (OutdoorgearLab website, February 27, 2013).42 66 67 71 78 62 61 76 71 6761 64 61 54 83 63 68 69 81 53a. Compute the mean, median, and mode.b. Compute the first and third quartiles.c. Compute and interpret the 90th percentile.arrow_forwardA school psychologist wants to test the effectiveness of a new method of teaching art. She recnuits 700 sixth-grade students and randomly divides them into two groups. Group 1 is taught by means of the new method, while grouD 2 is taught by traditional methods. The same teacher is assigned to teach both groups. At the end of the year, an achievement test is administered and the results of the two groups are compared. Complete parts (a) through (h) below. (a) What is the response variable in this experiment? O A. The score of group 2 on the achievement test O B. The scores on the achievement tests of both group 1 and group 2 O C. The score of group 1 on the achievement test O D. The students' ability in art (b) Is the response variable qualitative or quantitative? O A. The response variable is qualitative because it is a characteristic. O B. The response variable is quantitative because it is a measurement. O C. The response variable is quantitative because it is a characteristic. The…arrow_forwardPlates are evaluated according to their surface finish, and placed into four categories: premium, conforming, downgraded, and unacceptable. A quality engineer claims that the proportions of plates in the four categories are 10%, 70%, 15%, and 5%, respectively. In a sample of 200 plates, 19 were classified as premium, 133 were classified as conforming, 35 were classified as downgraded, and 13 were classified as unacceptable. Can you conclude that the engineer’s claim is incorrect?arrow_forward
- GreenLawns provides a lawn fertilizer and weed control service. The company is adding a special aeration treatment as a low-cost extra service option, which it hopes will help attract new customers. Management is planning to promote this new service in two media: radio and direct-mail advertising. A media budget of $3,500 is available for this promotional campaign. Based on past experience in promoting its other services, GreenLawns obtained the following estimate of the relationship between sales and the amount spent on promotion in these two media. S = −2R2 − 10M2 − 8RM + 18R + 34M where S = total sales in thousands of dollars R = thousands of dollars spent on radio advertising M = thousands of dollars spent on direct-mail advertising. GreenLawns would like to develop a promotional strategy that will lead to maximum sales subject to the restriction provided by the media budget. (a) What is the value of sales (in dollars) if $2,500 is spent on radio advertising and $1,000 is…arrow_forwardGreenLawns provides a lawn fertilizer and weed control service. The company is adding a special aeration treatment as a low-cost extra service option, which it hopes will help attract new customers. Management is planning to promote this new service in two media: radio and direct-mail advertising. A media budget of $3,500 is available for this promotional campaign. Based on past experience in promoting its other services, GreenLawns obtained the following estimate of the relationship between sales and the amount spent on promotion in these two media. S-2R²10M²8RM +18R+ 34M where GreenLawns would like to develop a promotional strategy that will lead to maximum sales subject to the restriction provided by the media budget. (a) What is the value of sales (in dollars) if $2,000 is spent on radio advertising and $1,500 is spent on direct-mail advertising? S = $ |x S = total sales in thousands of dollars R thousands of dollars spent on radio advertising M = thousands of dollars spent on…arrow_forwardGreenLawns provides a lawn fertilizing and weed control service. The company is adding a special aeration treatment as a low-cost extra service option, which it hopes will help attract new customers. Management is planning to promote this new service in two media: radio and direct-mail advertising. A media budget of $2,500 is available for this promotional campaign. Based on past experience in promoting its other services, GreenLawns obtained the following estimate of the relationship between sales and the amount spent on promotion in these two media. S = -2R² 10M² - 8RM + 18R+ 34M where S = total sales in thousands of dollars R = thousands of dollars spent on radio advertising M = thousands of dollars spent on direct-mail advertising GreenLawns would like to develop a promotional strategy that will lead to maximum sales subject to the restriction provided by the media budget. (a) What is the value of sales (in dollars) if $2,000 is spent on radio advertising and $500 is spent on…arrow_forward
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillCalculus For The Life SciencesCalculusISBN:9780321964038Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.Publisher:Pearson Addison Wesley,Big Ideas Math A Bridge To Success Algebra 1: Stu...AlgebraISBN:9781680331141Author:HOUGHTON MIFFLIN HARCOURTPublisher:Houghton Mifflin Harcourt
- Algebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:Cengage