Problem 13-7 (Algo)Ten samples of 15 parts each were taken from an ongoing process to establish a p-chart for control. The samples and the number ofdefectives in each are shown in the following table.SAMPLE1L23456TBSG: 15 15 15 15 15 15 15 15 15 1578910nPSplucuNUMBER OFDEFECTIVEITEMS IN THESAMPLE132222724Na. Determine the p. Sp. UCL and LCL for a p-chart of 95 percent confidence (1.96 standard deviations). (Leave no cells blank. Roundup any negative LCL value to "O". Round your answers to 3 decimal places.) ookint-intrencesa. Determine the p, Sp, UCL and LCL for a p-chart of 95 percent confidence (1.96 standard deviations). (Leave no cells blank. Roundup any negative LCL value to "0". Round your answers to 3 decimal places.)PSpUCLLCLb. What comments can you make about the process?O Process is out of statistical controlO Process is in statistical control

Firstly calculating: Sample n No.of defectives Proportion of defects 1 15 1 0.067 2 15 3…

Answered: Ten samples of 15 parts each were taken…

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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8. Question content area Part 1 Refer to the table Factors for Computing Control Chart Limits (3 sigma) LOADING... for this problem. Your supervisor, Lisa Lehmann, has asked that you report on the output of a machine on the factory floor. This machine is supposed to be producing optical lenses with a mean weight of 50 grams and a range of 3.5 grams. The following table contains the data for a sample size of n=6 taken during the past 3 hours: Sample 1 2 3 4 5 6 7 8 9 10 x 55 47 49 50 52 57 55 48 51 56 R 3 1 5 3 2 6 3 2 2 3 Part 2 Set the control limits for this process for the x-chart when the machine is working properly. UCL-x = _______? grams (round to two decimal places) LCL-x = ________? grams (round to two decimal places) B) Set the control…
Q14. The following table contains the measurements of the key length dimensions from a fuel injector.These samples of size five were taken at one -hour intervals. a. Construct a three-sigma x-chart and R-chart (use Exhibit 6.13) for the length of the fuel injector.what can you say about this process? The picture of Exhibit 6.13 is attached The picture with the sample number and observations also attached. Thanks
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…
Question 1 Managing the Risk Management Function a) A manufacturer of computer disks took samples of 100 disks on 6 consecutive days.The number of disks with bad sectors was determined for each of these samples.The results are in the table that follows.Day Sample Size Bad 1 100 18 2 100 14 3 100 10 4 100 17 5 100 16 6 100 12Construct the p control chart table and determine whetherA) at least one point is outside of the control limitsB) a increasing trend is detectedC) a decreasing trend is detectedD) the process is in-control.
Checkout time at a supermarket is monitored using a mean and a range chart. Six samples of n = 20 observations have been obtained and the sample means and ranges computed: Sample Mean Range Sample Mean Range 1 3.06 .42 4 3.13 .46 2 3.15 .50 5 3.06 .46 3 3.11 .41 6 3.09 .45 a. Using the factors in Table 10.3 , determine upper and lower limits for mean and range charts. b. Is the process in control?
Six samples of five observations each have been taken for a process. The sample means and ranges computed (in minutes) are, (mean, range): (3.55, 0.76), (4.03, 0.7), (3.72, 0.41), (3.74, 0.48), (4.09, 0.76), and (3.74, 0.62). Compute the upper control limit a. 4.11 b. 4.172 c. 2.451 d. 2.832
Q4) Ten samples of size four were taken from a process, and their weights measured. The sample averages and sample ranges are in the following table. Construct and plot an x-bar and R-chart using these data. Is the process in control? Sample Mean Range 1 20.01 0.45 2 19.98 0.67 3 20.25 0.30 4 19.90 0.30 5 20.35 0.36 6 19.23 0.49 7 20.01 0.53 8 19.98 0.40 9 20.56 0.95 10 19.97 0.79
Computer upgrade times (in minutes) are being evaluated. Samples of five observations each have been taken, and the results are as listed. Using factors from Table 10.3, determine upper and lower control limits for mean and range charts, and decide if the process is in control. SAMPLE 1 2 3 4 5 6 79.2 80.5 79.6 78.9 80.5 79.7 78.8 78.7 79.6 79.4 79.6 80.6 80.0 81.0 80.4 79.7 80.4 80.5 78.4 80.4 80.3 79.4 80.8 80.0 81.0 80.1 80.8 80.6 78.8 81.1
Problem 5) The manager of a building supplies company, mills his own wood on site to save money. He wants to see if his work meets the quality specifications. Industry standard defective rate for all milled wood is 15%, when it can’t be used any more. From each run, 30 samples of 2x6 are measured and inspected, the Area is calculated. 8.24 8.25 8.24 8.24 8.25 8.25 8.46 8.26 8.26 8.26 8.26 8.54 8.26 8.24 8.31 8.35 8.24 8.23 8.23 8.24 8.28 8.23 8.25 8.25 8.25 8.24 8.24 8.24 8.28 8.28 a) Calculate the Upper Action Line. b) Calculate the Upper Warning Line c) Construct the appropriate control chart using R. d) Is this data in a process of control? How do you know? Explain your answer. If it is not, what are some recommendations you can give to get the data back into a process of control.
Checkout time at a supermarket is monitored using a mean and a range chart. Six samples of n = 20 observations have been obtained and the sample means and ranges computed: Sample Mean Range 1 3.06 .42 2 3.15 .50 3 3.11 .41 4 3.13 .46 5 3.06 .46 6 3.09 .45 Using the factors in Table 10.3 , determine upper and lower limits for mean and range charts. Is the process in control?
Administering new bank accounts is intended to average 15 minutes each. Five samples of four observations each have been taken. Use the sample data in concurrence with Table 2.3 to create upper and lower control limits for both a mean chart and a range chart. Do results propose that the procedure is in control? Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 11.2 11.3 10.7 10.9 10.8 10.9 10.8 10.9 11.3 11.2 10.8 10.9 10.9 11.1 11.3 11.1 11.4 11.1 11.5 10.7 Total: 44 44.4 43.6 44.8 44
Problem 10-24 (Algo) A shirt manufacturer buys cloth by the 100-yard roll from a supplier. For setting up a control chart to manage the irregularities (e.g., loose threads and tears), the following data were collected from a sample provided by the supplier. SAMPLE 1 2 3 4 5 6 7 8 9 10 IRREGULARITIES 3 4 2 4 6 5 6 5 4 3 Determine the c⎯⎯�¯ , Sc�� , UCL and LCL for a c -chart with z = 2. Note: Leave no cells blank. Round up any negative LCL value to “0”. Round your answers to 2 decimal places. Suppose the next five rolls from the supplier had four, four, two, two, and eight irregularities. Is the supplier process under control? multiple choice Yes No

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