Jim's Outfitters, Ic., makes custom western shirts. The shirts could be flawed in various ways,including flaws in the weave or color of the fabric, loose buttons or decorations, wrongdimensions, and uneven stitches. Jim randomly examined 10 shirts, with the following resultsshown to the right.ShirtDefects1103911536973869107a. Assuming that 10 observations are adequate for these purposes, determine the three-sigma control limits for defects per shirt.The UCL, equals and the LCL. equals| (Enter your responses rounded to two decimal places. If your answer for LCL, is negative, enter this value as 0.)

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Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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Jim’s Outfitters, Inc., makes custom fancy shirts for cowboys. The shirts could be flawed in various ways, including flaws in the weave or color of the fabric, loose buttons or decorations, wrong dimensions, and uneven stitches. Jim randomly examined 10 shirts, with the following results:Shirt Defects1 82 03 74 125 56 107 28 49 610 6a. Assuming that 10 observations are adequate for these purposes, determine the three-sigma control limits for defects per shirt.b. Suppose that the next shirt has 13 flaws. What can you say about the process now?
Jim's Outfitters, Inc., makes custom western shirts. The shirts could be flawed in various ways, including flaws in the weave or color of the fabric, loose buttons or decorations, wrong dimensions, and uneven stitches. Jim randomly examined 10 shirts, with the following results shown to the right. Shirt Defects 1 6 2 0 3 7 4 10 5 6 6 9 7 1 8 5 9 4 10 8 a. Assuming that 10 observations are adequate for these purposes, determine the three-sigma control limits for defects per shirt. The UCL Subscript cUCLc equals enter your response here and the LCL Subscript cLCLcequals enter your response here. (Enter your responses rounded to two decimal places. If your answer for LCL Subscript cLCLc is negative, enter this value as 0.)
* In Problem 42.4, the design specification on the diameteris 28.0±2.0mm. (a)What proportion of parts fall outside the tolerance limits? (b) If the process were adjusted so that its mean diameter = 28.0 mm and the standard deviation remained the same, what proportion of parts would fall outside the tolerance limits? (c) With the adjusted mean at 28.0 mm, determine the value of the process capability index. Problem 42.4 A plastic extrusion process produces round extrudate with a mean diameter = 28.6 mm. The process is in statistical control and the output is normally distributed with standard deviation = 0.53 mm. Determine the process capability.
Vilfredo Pareto was a famous engineer/economist in the 19th and early 20th centuries. He reportedly expressed this 80/20 Rule: 80% of all progress results from 20% of the actions taken. The Pareto Diagram, also called a Juran Diagram, depicts a variant 80/20 Rule: 80% of all production problems come from 20% of the problem areas. a. What kind of statistical chart is the Pareto Diagram? ____ (enter H for histogram, P for probability distribution, T for a Taguchi chart, A for all three of these. N for none of these. b. The value of the Pareto Diagram is its highlighting the areas causing 80% of quality problems. ____ (enter T for true or F for false)
A. Five data entry operators work at the data processing department of the Birmingham Bank. Each day for 30 days, the number of defective records in a sample of 350 records typed by these operators has been noted, as follows: Sample No. No. Defectives Sample No. No. Defectives Sample No. No. Defectives 1 8 11 7 21 16 2 5 12 5 22 11 3 19 13 15 23 6 4 10 14 3 24 6 5 10 15 12 25 13 6 7 16 7 26 11 7 11 17 12 27 15 8 9 18 3 28 6 9 7 19 18 29 12 10 12 20 16 30 4 a) Establish 3σ upper and lower control limits. UCLp = nothing (enter your response as a number between 0 and 1, rounded to three decimal places). B. Peter Ittig's department store, Ittig Brothers, is Amherst's largest independent…
As the supervisor in charge of shipping and receiving,you need to determine the average outgoing quality in a plantwhere the known incoming lots from your assembly line havean average defective rate of 3%. Your plan is to sample 80 unitsof every I ,000 in a lo t. The number of defects in the sample isnot to exceed 3. Such a plan provides you with a probabilityof acceptance of each lot of . 79 (79%). What is your averageoutgoing quality?
4. C-Spec, Inc., is attempting to determine whether an existing machine is capable of milling an engine part that has a key specification of 4 ± 0.003 inches. After a trial run on this machine, C-Spec has determined that the machine has a sample mean of 4.001 inches with a standard deviation of 0.002 inch. a. Calculate the capability ratio for this machine. b. Calculate the capability index for this machine c. Should C-Spec use this machine to produce this part? d. Explain why? e. Show computation
Period (t) Enrollment (1000s) 1 6.5 2 8.1 3 8.4 4 10.2 5 12.5 6 13.3 7 13.7 8 17.2 9 18.1 Develop a linear regression with a dependent variable of “Enrollment (1000s). A.What is the value of R square? (Make sure two decimal places.) B.What is the value of intercept? (Make sure two decimal places.) C.What is the coefficient value of Period (t)? (Make sure two decimal places.) D.Is the coefficient of Period (t) significant? (Yes:1, No: 0) E.What is the forecast for year 10?
Aspen Plastics produces plastic bottles to customer order. The quality inspector randomly selects four bottles from the bottle machine and measures the outside diameter of the bottleneck, a critical quality dimension that determines whether the bottle cap will fit properly. The dimensions (inch) from the last six samples are: BOTTLE Sample 1 2 3 4 1 0.694 0.622 0.698 0.69 2 0.687 0.611 0.697 0.613 3 0.671 0.680 0.695 0.602 4 0.610 0.615 0.685 0.678 5 0.680 0.624 0.618 0.614 6 0.685 0.693 0.607 0.669 What would be the center line of a 3-sigma S chart? Answer:
Problem 10-5 (Algo) Using samples of 196 credit card statements, an auditor found the following:Use Table-A. Sample 1 2 3 4 Number with errors 4 3 6 9 Click here for the Excel Data File a. Determine the fraction defective in each sample. (Round your answers to 4 decimal places.) b. If the true fraction defective for this process is unknown, what is your estimate of it? (Round your answer to 1 decimal place.) c. What is your estimate of the mean and standard deviation of the sampling distribution of fractions defective for samples of this size? (Round your intermediate calculations and final answers to 4 decimal places.) d. What control limits would give an alpha risk of .03 for this process? (Round your intermediate calculations to 4 decimal places. Round your "z" value to 2 decimal places and other answers to 4 decimal places.) e. What alpha risk would control limits of .0470 and .0092 provide? (Round your intermediate calculations to 4 decimal…
Problem 1: Auto pistons at Wemming Chung’s plant in Shanghai are produced in a forging process, and the diameter is a critical factor that must be controlled. From sample sizes of 10 pistons produced each day, the mean and the range of this diameter have been as follows: Day Mean (mm) Range (mm) 1 156.9 4.2 2 153.2 4.6 3 153.6 4.1 4 155.5 5.0 5 156.6 4.5 a) What are the UCL x (line on top of x, counldn't find the button to do it) and LCL x (line on top of x) , using 3σ? Plot the data. b) What are the UCL R and LCL R , using 3σ? Plot the data. c) Is the Process in Control? (Please screen shot the EXCEl if its in excel) Note:- Do not provide handwritten solution. Maintain accuracy and quality in your answer. Take care of plagiarism. Answer completely. You will get up vote for sure.
Grindwell, Inc., a manufacturer of grinding tools, is concernedabout the durability of its products, which dependson the permeability of the sinter mixtures used in production.Suspecting that the carbon content might be the source of theproblem, the plant manager collected the following data: Carbon Content (%) Permeability Index 5.5 3.0 4.5 4.8 4.2 4.7 5.1 4.4 3.6 163121191623201120 a. Draw a scatter diagram for these data.b. Is there a relationship between permeability and carbon content?c. If low permeability is desirable, what does the scatter diagram suggest with regard to the carbon content?

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