At Quickie Car Wash, the wash process is advertised to take less than 7 minutes. Consequently, management has set a target average of 400 seconds for the wash process. Suppose the average range for a sample of 9 cars is 12 seconds. Use the accompanying table to establish control limits for sample means and ranges for the car wash process.The UCLx equals enter your response here seconds and the LCLx equals enter your response here seconds. (Enter your responses rounded to two decimal places.) -XMore infoFactors for calculating three-sigma limits for the x-chart and R-chartFactor for LOCL forFactor for UCL forSize of Sample Factor for UCL and LCL(n)for x-chart (A2)R-Chart (D3)R-Chart (D4)3.2671.8802.57531.0232.28240.7292.1150.5770.4830.2.0040.4190.0761.9248.0.3730.1361.8646.0.3370.1841.8160.3080.2231.77710 At Quickie Car Wash, the wash process is advertised to take less than 7 minutes. Consequently, management has set a target average of 400 seconds for the washprocess. Suppose the average range for a sample of 9 cars is 12 seconds. Use the accompanying table to establish control limits for sample means and ranges forthe car wash process.E Click the icon to view the table of factors for calculating three-sigma limits for the x-chart and R-chart.The UCLR equals 21.79 seconds and the LCL, equals 2.21 seconds. (Enter your responses rounded to two decimal places.)The UCL- equalsseconds and the LCL; equals seconds. (Enter your responses rounded to two decimal places.)

Answered: At Quickie Car Wash, the wash process…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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At Quickie Car Wash, the wash process is advertised to take less than 7 minutes. Consequently, management has set a target average of 400 seconds for the wash process. Suppose the average range for a sample of 9 cars is 12 seconds. Use the accompanying table to establish control limits for sample means and ranges for the car wash process. The UCLx equals enter your response here seconds and the LCLx equals enter your response here seconds. (Enter your responses rounded to two decimal places.)

-X
More info
Factors for calculating three-sigma limits for the x-chart and R-chart
Factor for LOCL for
Factor for UCL for
Size of Sample Factor for UCL and LCL
(n)
for x-chart (A2)
R-Chart (D3)
R-Chart (D4)
3.267
1.880
2.575
3
1.023
2.282
4
0.729
2.115
0.577
0.483
0.
2.004
0.419
0.076
1.924
8.
0.373
0.136
1.864
6.
0.337
0.184
1.816
0.308
0.223
1.777
10

Expert Solution

Introduction

The control chart has three limit points, they are upper control limit, lower control limit and the central limit. If the value exceeds the limit, then it is out of control. If the values not exceeds then it is in control. The control limit of x bar chart is calculated using the formula :

$\begin{array}{rcl} \bar{\bar{x}} \end{array} \pm \begin{array}{rcl} A_{2} \end{array} \begin{array}{rcl} \bar{R} \end{array}$