Answer
The mean of HDL cholesterol blood component is 92.5.
The standard deviation of the HDL cholesterol blood component is 28.75.
Work Step by Step
The mean for the blood component is calculated as the midpoint of the reference interval corresponding to that component. Therefore, mean of the given reference interval is calculated as follows:
\[\begin{align}
& \bar{x}=\frac{35+150}{2} \\
& =92.5
\end{align}\]
The standard deviation for the blood component is calculated by dividing the range of the reference interval by 4. Therefore, the standard deviation is calculated as follows:
\[\begin{align}
& \sigma =\frac{\text{Range}}{4} \\
& =\frac{\text{Maximum Value - Minimum Value}}{4} \\
& =\frac{150-35}{4} \\
& =\frac{115}{4}
\end{align}\]\[\]
\[=28.75\]
