uncertainty

• measurement?


  a quantity that has both a number and a unit
• accuracy?


  measure of how close a measurement comes to the actual or true value of what is being measured
• precision?


  measure of how close a series of measurements are to one another
• percentage error?


  the absolute value of the error divided by the accepted value, multiplied by 100%
• percentage error calculation?


  % error = measured - accepted / accepted x 100
• significant digits in a measurement ?

  consist of all the digits known with certainty plus one final digit, which is somewhat uncertain or is estimated