Precision Measurement and Calibration: Statistical concepts and procedures, H. H. Ku, edU.S. Government Printing Office, 1968 |
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Page 18
... factors and the sequence will , in the absence of seasonal or other systematic trouble , approximate a sequence of independent values . If the weighing conditions. 18-17 B Measuring precision without duplicates Interpretation of the ...
... factors and the sequence will , in the absence of seasonal or other systematic trouble , approximate a sequence of independent values . If the weighing conditions. 18-17 B Measuring precision without duplicates Interpretation of the ...
Page 23
... factors involved in the measurement of a quantity are : the apparatus and auxiliary equipment ( e.g. , reagents , batteries or other source of electrical energy , etc. ) employed ; the operators and observers , if any , involved ; the ...
... factors involved in the measurement of a quantity are : the apparatus and auxiliary equipment ( e.g. , reagents , batteries or other source of electrical energy , etc. ) employed ; the operators and observers , if any , involved ; the ...
Page 38
... factor given in the d2 column of table B2 of [ ASTM 1951 , p . 115 ] corresponding to the sample or subgroup size n used in constructing the R - chart . Alternatively , if desired , an unbiased estimate of o can be obtained directly ...
... factor given in the d2 column of table B2 of [ ASTM 1951 , p . 115 ] corresponding to the sample or subgroup size n used in constructing the R - chart . Alternatively , if desired , an unbiased estimate of o can be obtained directly ...
Page 43
... factor concerned , and so forth , " the experi- menter presently will feel justified in saying that he feels , or believes , or is of the opinion , " that the systematic error due to the particular ' source in question does not exceed ...
... factor concerned , and so forth , " the experi- menter presently will feel justified in saying that he feels , or believes , or is of the opinion , " that the systematic error due to the particular ' source in question does not exceed ...
Page 61
... factors to estimate x - x There will be times when more than two choices are possible and of interest for some of the variables . I re- gret to say that the enumeration of efficient designs for such mixtures of two and three choices has ...
... factors to estimate x - x There will be times when more than two choices are possible and of interest for some of the variables . I re- gret to say that the enumeration of efficient designs for such mixtures of two and three choices has ...
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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 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.