Student_01_3 - ACTIVITY 01-3 Signicant Figures in Data WHY?...

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11 W HY ? The number of digits or f gures reported for a numerical quantity conveys the quality of the measurement or result to the reader. For example, a loan interest rate of 8.00% or 8.25% cited by a salesperson appears to be more exact than one quoted as 8%. In any business involving numerical values, the quality of the value is vital information. In this course and in others, and in your career, you will be expected to use a meaningful number of digits in reporting your numerical results. L EARNING O BJECTIVES Appreciate the difference between accuracy and precision. Understand the relationship between precision and the number of signi f cant f gures in a number. S UCCESS C RITERIA Identify the accuracy and precision of a numerical value. Report computed values to the correct number of signi f cant f gures. P REREQUISITES • Activity 01-1: Units of Measurement • Activity 01-2: Unit Analysis I NFORMATION Accuracy is the degree of conformity to a standard or true value. Precision is the smallest repeatable digit of a measurement. Signi f cant f gures are the repeatable digits and the f rst uncertain digit in a measurement or calculation. M
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This note was uploaded on 09/19/2011 for the course CHE 1112R taught by Professor Meghee during the Fall '11 term at St. Johns Duplicate.

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Student_01_3 - ACTIVITY 01-3 Signicant Figures in Data WHY?...

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