Evaluation Flashcards
Define accuracy
How close a measured or calculated value is to the true value
Define anomaly
A result that does not fit the expected trend or pattern
Define precision
The closeness of agreement between measured values obtained by repeated measures
Define standard deviation
The variability of the data, the size of its spread around the mean
Name four possible limitations during an experiment
Not always possible to control extraneous variables
Degree of accuracy of measurements
Sample size
Lack of equipment
What can cause errors? (3)
Inadequacies and imperfections in experimental procedures
Lapses of judgement by experimenter
Limits to resolution, precision or accuracy of measuring apparatus
What cause random errors?
Due to judgement errors made by the experimenter are reduced when procedure is repeated several times
What causes systematic errors?
May be inherent in the equipment and are repeated at every replicate
How can systematic errors be factored out?
A calculation can be down to determine margin of error
