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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
\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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