Compute the Standard Deviation for Ages of British Nurses in 1851

question 14

Multiple Choice

Compute the standard deviation for ages of British nurses in 1851. Assume that the table below shows the age distribution of nurses in Great Britain in 1851. Round your answer to nearest hundredth. $$\mathcal { \sigma }$$ $$\begin{array} { | l | c | c | c | c | c | c | c | } \hline \text { Age range (yr) } & \mathbf { 2 0 } - \mathbf { 2 9 } & \mathbf { 3 0 } - \mathbf { 3 9 } & \mathbf { 4 0 } - \mathbf { 4 9 } & \mathbf { 5 0 } - \mathbf { 5 9 } & \mathbf { 6 0 } - \mathbf { 6 9 } & \mathbf { 7 0 } - \mathbf { 7 9 } & \mathbf { 8 0 } + \\\hline \text { Midpoint } ( x ) & 24.5 & 34.5 & 44.5 & 54.5 & 64.5 & 75.5 & 84.5 \\\hline \text { Percent of nurses } & 5.8 \% & 9.8 \% & 19.6 \% & 29.2 \% & 25.1 \% & 9.1 \% & 1.4 \% \\\hline\end{array}$$

• A)13.57
• B)1.52
• C)3.26
• D)53.68
• E)17.26

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Definitions:

Standard Deviation

A statistical measure of the dispersion or variability of a set of data points, often used in finance to gauge the volatility of an investment's return.

Monthly Excess Returns

Returns from an investment over and above the risk-free rate of return on a monthly basis, used to evaluate investment performance.

Nondiversified Investor

An investor who concentrates their investment in a limited selection of assets, increasing risk compared to diversified strategies.

Expected Excess Return

The return expected on an investment over and above the risk-free rate, taking into account both the risk involved and the time value of money.