A process sampled 20 times with a sample of size 9 resulted in a = 26.5 and R = 1.9. Compute the upper and lower control limits for the and R charts for this process. Round your answers to two decimal places. Use Table 19.3. R Chart: UCL LCL Chart: UCL LCL 00 00

If a point on a control chart falls outside one of the control limits, this suggests that the process output is non-random and should be investigated. O a. TRUE O b. FALSE 10 19 NEXT PAGE 28 IOUS PAGE Finish at 82°F Mostly er

Lower Range, Sample Size, n Mean Factor, Upper Range, DA A2 D3 2 1.880 3.268 3 1.023 2.574 4 0.729 2.282 5 0.577 2.115 6 0.483 2.004 7 0.419 1.924 0.076 8 0.373 1.864 0.136 0.337 1.816 0.184 10 0.308 1.777 0.223 12 0.266 1.716 0.284

7.  The school board is trying to evaluate a new math program introduced to​ second-graders in five elementary schools across the county this year. A sample of the student scores on standardized math tests in each elementary school yielded the following​ data:                                                       School No. of Test Errors A 48   B 21   C 32   D 40   E 52     For the test​ errors, the c​-chart with control limits that contain​ 99.73% of the random variation in test scores​ is: _____ Part 2 UCLc​= _______ ​(round your response to two decimal​ places). LCLc​= _______ ​(round your response to two decimal​ places). What does the chart tell you? Has the new math program been effective?

The results of inspection of DNA samples taken over the past 10 days are given below. Sample size is 100. LCLp Day Defectives = 1 5 2 7 3 7 4 9 5 5 6 6 a) The upper and lower 3-sigma control chart limits are: UCL = 0.127 (enter your response as a number between 0 and 1, rounded to three decimal places). (enter your response as a number between 0 and 1, rounded to three decimal places). 7 1 8 6 9 10 10 1

An X-bar chart has the following control limits UCL=251.5 and LCL=248.5. The sample size is n=4, the process mean is equal to 250 and the process standard deviation is sigma = 1.0. What is the Cp value ? 0.500 not enough information 0.316 0.408 0.447 0.353

At Quick Car​ Wash, the wash process is advertised to take less than 7 minutes.​ Consequently, management has set a target average of 390 seconds for the wash process. Suppose the average range for a sample of 9 cars is 8 seconds. Use the accompanying table to establish control limits for sample means and ranges for the car wash process.   LOADING... Click the icon to view the table of factors for calculating​ three-sigma limits for the x overbarx​-chart and​ R-chart.   Factors for calculating​ three-sigma limits for the x overbarx​-chart and​ R-chart   Size of Sample​ (n) Factor for UCL and LCL for x overbarx​-chart ​(Upper A 2A2​) Factor for LCL for​ R-Chart ​(Upper D 3D3​) Factor for UCL for​ R-Chart ​(Upper D 4D4​) 2 1.8801.880 00 3.2673.267 3 1.0231.023 00 2.5752.575 4 0.7290.729 00 2.2822.282 5 0.5770.577 00 2.1152.115 6 0.4830.483 00 2.0042.004 7 0.4190.419 0.0760.076 1.9241.924 8 0.3730.373…

At Quick Car​ Wash, the wash process is advertised to take less than 6 minutes.​ Consequently, management has set a target average of 320 seconds for the wash process. Suppose the average range for a sample of 10 cars is 10 seconds. Use the accompanying table to establish control limits for sample means and ranges for the car wash process.

K The school board is trying to evaluate a new math program introduced to second-graders in five elementary schools across the county this year. A sample of the student scores on standardized math tests in each elementary school yielded the following data: School A 4 C E No. of Test Errors 48 21 32 40 52 For the test errors, the c-chart with control limits that contain 99.73% of the random variation in test scores is: UCL = errors (round your response to two decimal places).

Resistors for electronic circuits are manufactured on a high-speed automated machine. The machine is set up to produce a large run of resistors of 1,000 ohms each. Use Exhibit 13.7. To set up the machine and to create a control chart to be used throughout the run, 15 samples were taken with four resistors in each sample. The complete list of samples and their measured values are as follows. Use three-sigma control limits. SAMPLE NUMBER 1 H234STO OHN345 5 6 7 8 9 10 11 ΕΕΕΕΕ 12 13 14 15 READINGS (IN OHMS) 1097 1094 978 1013 976 1016 977 986 983 1026 988 1014 991 1030 995 991 1023 1014 982 970 1030 1027 1017 1004 995 982 994 1008 1001 1004 995 1015 1026 978 1017 984 995 1007 988 970 1004 1028 1019 983 990 1026 1017 1010 987 994 1030 974 995 1012 1016 1011 983 1018 981 1020