ENGR 100 Lecture Notes - Lecture 24: Decimal Mark, Trailing Zero, Significant Figures
Document Summary
When systematic errors are quantified, the measurement can be corrected to remove bias. The offset is subtracted from measurement, or. Must be estimated and quoted with measurement. Source of random errors i. e. estimating position of needle of a gauge or a meter requires interpolation between scale markings. Precision of measurement is limited by ability of observer to resolve small distances. Precision of the readings will be a fraction of the amount between scale markings, typically one-tenth. Exponent of 10 is a multiple of 3 to correspond to si prefixes. Measurement is complete only when a statement about its uncertainty is included. Uncertainty is normally expressed as an estimated range. Measurement may be expresses in fixed, scientific or engineering notation. Uncertainty may be given in either absolute or relative form. Fixed notation with error is absolute form: Fixed notation with error in relative form: Vs = 343. 5m/s 0. 9 m/s = (343. 5 0. 9) m/s.
