Num Sol

• Accuracy - refers to how closely a computed

  or measured value agrees with the true

  value.
• Precision - refers to how closely individual

  computed or measured values agree with

  each other.
• Inaccuracy - (also called bias) is defined as

  systematic deviation from the truth.
• Imprecision -(also called uncertainty), on

  the other hand, refers to the magnitude of

  the scatter
• RELATIVE APPROXIMATE ERROR - Defined as the ratio between the approximate error and the present approximation.
• APPROXIMATE ERROR - Defined as the difference between the present approximation and the previous approximation.
• TRUE ERROR - Defined as the difference between the true value in a calculation and the approximate value found using a numerical method.
• Roundoff errors - arise because digital computers cannot represent some quantities exactly. They are important to engineering and scientific problem-solving because they can lead to erroneous results. In certain cases, they can lead to a calculation going unstable and yielding obviously erroneous results.
• Truncation errors - are those that result from using an approximation in place of an exact mathematical procedure.