# Shared Flashcard Set

## Details

BAE 1022
Final Exam
23
Engineering
05/03/2006

Term
 3 experimental errors
Definition
 procedural variations, instrument precision, human errors
Term
 Most random sample variability will follow a _____ distribution.
Definition
 Normal distribution
Term
 ___% of the data will fall within the one standard deviation of the mean.
Definition
 68%
Term
 ___% will fall within 2 standard deviations of the mean
Definition
 95%
Term
 Skew
Definition
 Third momentum about the mean of a sample
Term
 Kurtosis
Definition
 Fourth moment about the mean of a sample. measure of the peakedness of the distribution (Normal = 3, less than - flat, more than - pointy)
Term
 precision
Definition
 A measure of repeatability
Term
 accuracy
Definition
 diff between th etrue value of a measured quantity and the measurment
Term
 Resolution
Definition
 Smallest interval measurable by an instrument
Term
 Absolute Accuracy
Definition
 Combined accuracy of a measurment and the datum
Term
 Relative Accuracy
Definition
 Accuracy controlled by the precision of the measurement
Term
 Blunders
Definition
 Errors caused by carlessness of observer.
Term
 Bias or Constant Errors
Definition
 errors of constant magnitude and sign. Usually caused by iproper calibration of the instrument. Sometimes be eliminated
Term
 Systematic Errors
Definition
 Errors of varying mangitude but constant sign.
Term
 Periodic Errors
Definition
 Errors of varying magnitude and sign but obeying some systematic law.
Term
 Random errors
Definition
 errors of varying sign and magnitude, and do not obey a systematic law
Term
 Treatment of Bias and Systematic Errors
Definition
 elimintaed where possible by careful calibration and observational procedures.
Term
 Treatment of Periodic and Random Errors
Definition
 Taking the mean of repeated observation.
Term
 strain
Definition
 elongation per length of sample
Term
 stress
Definition
Term
 median
Definition
 value of sample where .5 of sample is greater and .5 is less than
Term
 sig fig
Definition
 a number that is likely to be correct
Term
 4 parts to the abstract
Definition
 objective, scope of work, results, conclusion
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