Precision Measurement and Calibration: Statistical concepts and procedures, H. H. Ku, edU.S. Government Printing Office, 1968 |
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Page 4
... percent is sufficient for our purpose , the target center is the area within the next to the last circle . Our measurements may group on either side of dead center , or may be randomly scattered across the center of the target , but as ...
... percent is sufficient for our purpose , the target center is the area within the next to the last circle . Our measurements may group on either side of dead center , or may be randomly scattered across the center of the target , but as ...
Page 15
... percent , of the observations are within the interval represented by its length . 22 WITH JUST THE NEW POINT , WHAT CAN WE SAY ABOUT THE LIMITING MEAN ? Figure 45 Assuming that the limits on the chart are based on large numbers of ...
... percent , of the observations are within the interval represented by its length . 22 WITH JUST THE NEW POINT , WHAT CAN WE SAY ABOUT THE LIMITING MEAN ? Figure 45 Assuming that the limits on the chart are based on large numbers of ...
Page 19
... percentage of the time . CALIBRATION BY LAB A AND LAB B USING NBS VALUES LABA LAB B 3SA 3SB யய E1 E1 E , + 3SA E , + 3SB S , SA AND S CAN BE NEARLY EQUAL . IF SO , THEN LAB A AND LAB B CAN CALIBRATE THIER OWN SET FROM SELECTED ...
... percentage of the time . CALIBRATION BY LAB A AND LAB B USING NBS VALUES LABA LAB B 3SA 3SB யய E1 E1 E , + 3SA E , + 3SB S , SA AND S CAN BE NEARLY EQUAL . IF SO , THEN LAB A AND LAB B CAN CALIBRATE THIER OWN SET FROM SELECTED ...
Page 31
... percent " [ Simon 1946 , p . 654 ] . On the other hand , a moderate degree of refinement is necessary in defining the " true length " and " true width " of the recessed area in a window sash to which a pane of glass is to be fitted ...
... percent " [ Simon 1946 , p . 654 ] . On the other hand , a moderate degree of refinement is necessary in defining the " true length " and " true width " of the recessed area in a window sash to which a pane of glass is to be fitted ...
Page 33
... percent of the measurements from process A will deviate from the truth by four units or more . ) Next , is process B more ( or less ) accurate than process C which is unbiased , but has a very low precision ? Process B has a positive ...
... percent of the measurements from process A will deviate from the truth by four units or more . ) Next , is process B more ( or less ) accurate than process C which is unbiased , but has a very low precision ? Process B has a positive ...
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Common terms and phrases
adjusted values analysis applied arithmetic mean ASTM average b₁ b₁x bias Bureau of Standards calculated calibration Churchill Eisenhart comparison components computed confidence interval confidence limits constant control chart correct corresponding curve degrees of freedom determinations effect equal equation evaluation example experiment experimental factors Figure formulas gage block given imprecision independent intercept interlaboratory interval estimate labora laboratory large number Least Squares limiting mean linear magnitude mass materials mathematical meas measurement process ment National Bureau normal distribution number of measurements observations obtained operation ORDP pair paper parameters percent plotted points population possible quantity radium standard range ratio relationship reported sample scores sequence Shewhart shown single slope sources specimens standard deviation standard error stations statistical control systematic error Table temperature test procedure tion tory true value uncertainty urement variables variance W. J. Youden W₁ weight
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Page 45 - ON THE ALGEBRAICAL AND NUMERICAL THEORY OF ERRORS OF OBSERVATIONS AND THE COMBINATION OF OBSERVATIONS.
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Page 72 - Manual on Quality Control of Materials (American Society for Testing and Materials, Philadephia, 1951).
Page 36 - It is another matter to formulate specific statements regarding these statistical characteristics of measurement processes. 4.2. 1 Precision — Precision may be stated in terms of an index of precision of the form ±a, where a is some positive number. The numerical value of a in any such index of precision will be smaller the more closely bunched are the individual measurements of a process. However, any such index must have a clearly understandable interpretation regarding variability of measurements....
Page 31 - Absolute certainty is a privilege of uneducated minds — and fanatics. It is, for scientific folk, an unattainable ideal.