In a Survey, 26 Voters Were Asked Their Ages

question 18

Essay

In a survey, 26 voters were asked their ages. The results are shown below. Construct a histogram to represent
the data (with 5 classes beginning with a lower class limit of 19.5 and a class width of 10). What is the
approximate age at the center? $\begin{array}{ccccccccccccc}43 & 56 & 28 & 63 & 67 & 66 & 52 & 48 & 37 & 51 & 40 & 60 & 62 \\66 & 45 & 21 & 35 & 49 & 32 & 53 & 61 & 53 & 69 & 31 & 48 & 59\end{array}$

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Definitions:

Regression

A statistical method used to estimate relationships among variables, often to predict a dependent variable from one or more independent variables.

Market Index

A statistical measure that indicates the performance of a group of stocks, representing a specific segment of the stock market.

Portfolio Standard Deviation

A statistical measure of the volatility of returns from a portfolio of assets, indicating the degree of investment risk.

Covariances

A measure that indicates the extent to which two variables change together, determining the degree of their correlation.