Aitehicles at one location keeps track of the mumber out- of service each day (see VEHICLE)....

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Aitehicles at one location keeps track of the mumber out- of service each day (see VEHICLE). Out of service is use for four or more hours Number Out of Service Proportionn 248 0.004 248 10 0.012 248 0.008 0024 248 15 16 0.032 19 0.016 the centerline and control limits for the appropriate control chart b. Are there any indications of a lack o a lack of control? onstant

224 Part Two Tools and Meshods olytc Sis Exercises afcturer of wood periódically examines screw heads for the pres- ence or absence of burrs a carefully designed Subgroags of 300 screws are seteees and examined using data appear below (see & BURR) Number of Screw Number of Screws with Burrs Observation with Burrs 12 13 13 17 15 16 17 19 24 23 19 a. Find the centerline and standard error b Find the control limits and zone boundaries. c. Are there any special causes of variation? Which observations? 7.2 A large metropolitan hospital processes many samples of blood daily. Some occa sionally get mislabeled or lost, so new samples are required (rework). Subgroups of 50 samples are tracked each day for a 30-day period (see BLOOD). Coo- struct a control chart to search for special sources of variation. Sample Numbern Number or Lost or Lost 17 18 19 50 21 50 23 24 25 50 50 50 50 50 50 28 13 14 、SO 30

각나 49 625 6 88 a56 97 8 gas, my 991 a 2 813 5 AA bankis studying the proportion of transactions made asing an automated teller machine (ATM). The following represents a series of days and the number of trans actions using the ATM (e ATM): Total Number of Number of ATM 385 Are There any indications of a lack of centrol? Wh why do they indicale a lack of conrol

of koyboard erroly that make their way into of pages in the past 26 7.8. A large publisher counts finished books. The number publications are (see & BOOK) Book Number of Number of Number ErorsPages Book Number of Number of Number Errors 612 432 538 is 16 232 41 332 $12 401 57 51 49 18 285 591 38 23 63 770 21 35 734 455 a. Determine the centerline and control limits for the appropriate control chart b Are there any indications of a lack of control? For which books? 7.9. Lots of cloth produced by a manufacturer are inspected for defects. Because of the natute of the inspecion process, theize of the inspection sample varies from lot to lat (see CLOTH) 100s of Square Yards Number of 1.0 1.6 1.9 13 10 1.3 12 13 19 control chart. b Are any special causes of variation proseot in the data? For which lots?

7.6. A given model of a large radar dish represents an area of opportunity in which nonconformities may occur Results for 2 ush asgmblies are (see RADAR) Number of 75 24 25 15 16 17 56 54 34 10 23 53 13 70 a Determine the centertine and control limits for the appropriate control chart b. Are there any indications of a lack of control? What are the indications, and why do they indicate a lack of control? 7.7. Samples of 90 retainer rings are examined for the number nonconforming. The re sults for 30 consecutive days are (see COPPER) Number 21 :-22 13 15 17 12 25 16 14 10 10 12 a. Determine the centerline and coetrol limits. b. Are there ny indications of a lack of control? On which days?

Chapter 7 Aianihate Coneul Chrts 233 7.13) The following 32 days of datepicee indings from a study conducted at ach day 500 fiüim onforming factory that manufactures film and inspected. The number of defective Day Numberb 21 12 14 15 16 17 18 19 Construct an np control chang Is the process in a state of statistical through 32 i 25 data points to calculate tial If not, when is it out of control? s and record data for days 26 ls the process in control for days 26 through 327 If not, when is it out of control?

Part Two Tools and Meshods fur Anolyveic Se Number of Errors of 0.048 0.024 0.032 0.032 0.072 0.000 0.000 0.032 0.024 0.008 0.080 10 90.072 0.024 0.048 0.024 0.040 0.024 ber 0.112 0.048 14 0.024 100.056 12 0.000 aConstroct a char if you did not already do so for Exercise 6.8. b Is the process in a state of statistical control? If not, when is it out of control? c. Construct an mp d. Compare the resul, of the叩chart with the results obtained with the p chart and explain ny sinilarities or differences.

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As there are so many questions, I am solving only one (7.1), as stated by HOMEWORKLIB POLICY. You need to upload other questions separately.

= 4254 Lower-contol LCL) linn. t 14.34 - Zone 6 LCしご旦ー2,0. 4:36. outliers andl hint he Special Coun of vevialion

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