Ch2 - Numbers from Measurements (Ch. 2) Aurex SC 6145...

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1 Numbers from Measurements (Ch. 2) § Aurex SC 6145 scientific calculator available at the SFU bookstore
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2 Measured Numbers 1 2 3 4 5 6 7 8 9 3. 7 3. 7 3.7 2
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3 Measured Numbers § Precision -how close multiple measurements are to each other -directly related to the measuring device § Accuracy -how close a measurement is to the “true” or accepted value
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4 Accuracy and Precision § Accuracy: » How close a particular value agrees with the “true” or accepted value accurate
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5 Precision § The degree of agreement among several measurements § Reflects the reproducibility of the measurement neither accurate nor precise precise but not accurate precise and accurate
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6 Errors § Random Errors -due to uncontrolled variables -result in a decrease in precision § Systematic Errors -constant errors -lead to a decrease in accuracy, do not affect precision -can be accounted for by calibration Any measurement has some uncertainty
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7 Precision and Significant Figures § significant figures:
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Ch2 - Numbers from Measurements (Ch. 2) Aurex SC 6145...

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