are: 11.97, 12.17, 13.94, 11.86, and 11.83 respectively. What are the lower and upper control limits for the R chart?

Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter29: Tolerance, Clearance, And Interference
Section: Chapter Questions
Problem 16A: Spacers are manufactured to the mean dimension and tolerance shown in Figure 29-12. An inspector...
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Question
In a fabric manufacturing factory, the quality control process using control charts from SPC. In an hour there are a total of 5 samples
are taken each having 4 observations regarding the thickness of fabric in measured in millimeters. In a particular hour, the sample
means (X-bar) are noted to be: 156.46, 199.62, 189.31, 102.22, and112.09 respectively. In the same sample, the corresponding ranges
are: 11.97, 12.17, 13.94, 11.86, and 11.83 respectively. What are the lower and upper control limits for the R chart?
on
t of
O a. 0,30.47
O b. 0,28.17
Oc. 0,24.71
O d. 0,31.17
O e. 0,29.17
O f.
None is correct
IOUS PAGE
NEXT PAGE
MacB
Transcribed Image Text:In a fabric manufacturing factory, the quality control process using control charts from SPC. In an hour there are a total of 5 samples are taken each having 4 observations regarding the thickness of fabric in measured in millimeters. In a particular hour, the sample means (X-bar) are noted to be: 156.46, 199.62, 189.31, 102.22, and112.09 respectively. In the same sample, the corresponding ranges are: 11.97, 12.17, 13.94, 11.86, and 11.83 respectively. What are the lower and upper control limits for the R chart? on t of O a. 0,30.47 O b. 0,28.17 Oc. 0,24.71 O d. 0,31.17 O e. 0,29.17 O f. None is correct IOUS PAGE NEXT PAGE MacB
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