TOPIC 3: Data Quality Flashcards
A deviation from the absolute value or from the true average of a large number of results.
Error
Error can be classified as?
systematic error and indeterminate error
Classes of Error
Systematic (Determinate Errors)
Random (Indeterminate Errors)
Errors that are reproducible and can be discovered and corrected.
Systematic Errors
Systematic Errors can be further classified into:
Instrumental Error
Method Error
Personal Error
Failure to calibrate, degradation of parts in the instrument, power fluctuations, variation in temperature.
Instrumental Errors
Errors due to no ideal physical or chemical behaviour, completeness and speed of
reaction, interfering side reactions, sampling problems.
Method Errors
Occur where measurements require judgment, result from prejudice, color acuity problems, negligence to follow proper procedures.
Personal Errors
This is observed by the same analyst when the successive measurements are made with the SAME IDENTICAL conditions.
Random Errors
Determinate Errors
Systematic Errors
Indeterminate Errors
Random Errors
Appear as slight variations in successive measurements due to causes that the analyst can not control.
Random Errors
A plot of indeterminate error would show a ________ frequency curve.
normal
This is establishing documented evidence which provides a high degree of assurance that a specific process, method, system, activity or equipment consistently produce a product meeting its predetermined specifications.
Validation
Pertains to agreement of an experimental results with true value.
Accuracy
The measure of reproducibility of data within a series of results
Precision
Measure of central tendency.
Mean
Difference between largest/smallest observations in a set of data.
Range
This measures the difference of the actual values with the mean value.
Average Deviation
Determined by dividing the average deviation by the mean.
Relative Average Deviation