September 8 0008 December 8 0008

# September 8 0008 december 8 0008

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August 10 0.01 September 8 0.008 October 11 0.011 November 10 0.01 December 8 0.008 Construct a p-chart for 95 percent confidence (this means we build a 1.96-sigma control chart and not 3-sigma control chart. Each industry has its own standard) and plot each of the months. (Remark: after you construct the control limits using the existing data, if there are any points outside the control limits, we don t need to reconstruct the control limits again for this case.) If the next three months show crime incidences in this area as January = 10 (out of 1,000 sampled) February = 12 (out of 1,000 sampled) March = 11 (out of 1,000 sampled) What comments can you make regarding the crime rate? Answer ̅ ( ) = 0.008333 1000 ) 008333 . 1 ( 008333 . ) 1 ( n p p S p = 0.00287 UCL = p + 1.96 S p = 0.008333 + 1.96(0.00287) = 0.01396 LCL = p - 1.96 S p = 0.008333 - 1.96(0.00287) = 0.0027 This study resource was shared via CourseHero.com
The process is in control. Therefore, it can be stated that the crime rate has not increased. However, there appears to be a gradual increase in the crime rate. This study resource was shared via CourseHero.com
4. The following table contains the measurements of the key length dimension from a fuel injector. These samples of size five were taken at one-hour intervals. OBSERVATIONS SAMPLE 1 2 3 4 5 1 0.486 0.499 0.493 0.511 0.481 2 0.499 0.506 0.516 0.494 0.529 3 0.496 0.5 0.515 0.488 0.521 4 0.495 0.506 0.483 0.487 0.489 5 0.472 0.502 0.526 0.469 0.481 6 0.473 0.495 0.507 0.493 0.506 7 0.495 0.512 0.49 0.471 0.504 8 0.525 0.501 0.498 0.474 0.485 9 0.497 0.501 0.517 0.506 0.516 10 0.495 0.505 0.516 0.511 0.497 11 0.495 0.482 0.468 0.492 0.492 12 0.483 0.459 0.526 0.506 0.522 13 0.521 0.512 0.493 0.525 0.51 14 0.487 0.521 0.507 0.501 0.5 15 0.493 0.516 0.499 0.511 0.513 16 0.473 0.506 0.479 0.48 0.523 17 0.477 0.485 0.513 0.484 0.496 18 0.515 0.493 0.493 0.485 0.475 19 0.511 0.536 0.486 0.497 0.491 20 0.509 0.49 0.47 0.504 0.512 Construct a three-sigma X-bar chart and R chart for the length of the fuel injector. What can you say about this process? (Remark: after you construct the control limits using the existing data, if there are any points outside the

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• Spring '17
• wert
• sh, ar stu, ed d

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