Tag Archives: infant pulse rate percent uncertainty

Problem 1-14: Solving for the percent uncertainty of 130±5 beats/min

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PROBLEM:

An infant’s pulse rate is measured to be 130±5 beats/min. What is the percent uncertainty in this measurement?

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SOLUTION:

The percent uncertainty can be calculated as

% uncertainty =δAA×100%=5 beats/min130 beats/min×100%=3.85 %  (Answer)\begin{align*} \%\:\text{uncertainty}\:& =\frac{\delta _A}{A}\times 100\% \\ & =\frac{5\:\text{beats/min}}{130\:\text{beats/min}}\times 100\% \\ & =3.85\:\% \ \qquad \ \color{DarkOrange} \left( \text{Answer} \right) \\ \end{align*}

Therefore, the percent uncertainty is 3.85%.

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