A process will be deemed to be "out of control" when: all data points are near the centerline the data points are randomly distributed inside the control limits three sample data points are plotted at exactly the same value a sample data point is plotted above the Upper Control Limit

C-Spec, Incorporated is attempting to determine whether an existing machine is capable of milling an engine part that has a key specification of 4 ± 0.003 inch. 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. Calculate the capability index ( Cpk��� ) for this machine. Note: Round your answer to 3 decimal places.   Should C-Spec use this machine to produce this part? multiple choice Yes No

Mrs. Crabapple has a class with three students, and she has had four quizzes so far this semester. She has created control charts to determine if the variation in students' scores from quiz to quiz is exhibiting only natural variation. Each of the quiz scores are shown below. The upper and lower control limits for the x-bar chart are 109.6 and 34.9, respectively. The upper and lower control limits for the R chart are 93.95 and 0, respectively. Quiz Bart Lisa Nelson 1 75 100 50 2 62 82 72 3 90 90 90 4 60 86 10 Is the process in control? O A. Yes OB. No

Twelve​ samples, each containing five​ parts, were taken from a process that produces steel rods at Emmanual​ Kodzi's factory. The length of each rod in the samples was determined. The results were tabulated and sample means and ranges were computed. The results​ were:                                                                                                                              Sample Sample Mean​ (in.) Range​ (in.) Sample Sample Mean​ (in.) Range​ (in.) 1 9.602 0.033 7 9.603 0.041 2 9.602 0.041 8 9.605 0.034 3 9.593 0.034 9 9.597 0.027 4 9.606 0.051 10 9.601 0.029 5 9.599 0.031 11 9.603 0.039 6 9.599 0.036 12 9.606 0.047 Part 2 For the given​ data, the x double overbarx ​= 9.6013 inches ​(round your response to four decimal​ places). Part 3 Based on the sampling​ done, the control limits for ​3-sigma x overbarx chart​ are:   Upper Control Limit ​(UCL Subscript x…

A process sampled 20 times with a sample of size 8 resulted in = 28.5 and R = 1.8. Compute the upper and lower control limits for the chart for this process. (Round your answers to two decimal places.) UCL = LCL = Compute the upper and lower control limits for the R chart for this process. (Round your answers to two decimal places.) UCL = LCL =

A process screens a certain type of potash granule, resulting in a mean diameter of 0.067 cm and a standard deviation of 0.004 cm. The allowable variation in granule diameter is from 0.048cm to 0.087cm. Is the process capable? a. Cannnot be determined because sample size is not available b. Cannot be determined because USL and LSL information is not available c. Process is NOT capable d. Process is capable

Freshly painted tables are inspected for blemishes in samples of size 1. The results for inspecting 12 samples follow:  Sample # Blemishes 1 4 2 12 3 7 4 10 5 8 6 12 7 2 8 14 9 4 10 11 11 6 12 15 Total blemishes: 105 Total tables inspected = 12*1 = 12 What is the value of the statistic plotted for sample 3?  Same table data. What is the Lower Control Limit for the most appropriate control chart?  Same table data. What is the lower boundary value between Zone B and Zone C? That is, what is the boundary between the Zones B and C that lie below the process average?

Which of the following graphical presentations is not appropriate for numerical data?   histogram pie chart time-series plot scatter plot

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The types of charts that can show three dimensions are: doughnut charts O bubble charts O surface charts column charts Oarea charts