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Shewhart X-bar
& R control charts Constructs
Shewhart X-bar and R charts. |
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| xi,j |
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Samples (one per row)
Data can have: decimal mark '.' or ',' ; and separator blank or tab.
No 'cr-lf'
(or blank line) at end ! |
| Show values ? |
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Shows the coordinates of the graph. • |
Constructs and draws Shewhart
X-bar and R control charts versus 'sample',
the sample (order) number. Data are supposed to be Gaussian.
Example data are ill-conditioned, for illustration. (Final estimated
μ and σ will be 54.554 and 2.1165 .)
Other data: GL/4-15.xlsx, Montg6 p232&236.xlsx |
| References: |
Plate: XbarRchart |
• SQC Online.
• Shewhart charts,
at NIST/SEMATECH e-Handbook of
Statistical Methods [2008-Jan].
• 1900-01-13: Cox,
Gertrude M. (1978-10-17) |
