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The Following Data Represent the Ages (In Years) of a Sample

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The following data represent the ages (in years) of a sample of 25 employees from a government
department: 31435623494233614428483844354064524247395327363520\begin{array} { | l | l | l | l | l | l | l | l | l | l | } \hline 31 & 43 & 56 & 23 & 49 & 42 & 33 & 61 & 44 & 28 \\\hline 48 & 38 & 44 & 35 & 40 & 64 & 52 & 42 & 47 & 39 \\\hline 53 & 27 & 36 & 35 & 20 & & & & & \\\hline\end{array} The frequency distribution for the data, using five class intervals and the value 20 as the lower limit of the first class is given below.  Class Limits  Frequency 20 up to 30430 up to 40740 up to 50950 up to 60360 up to 702 Total 25\begin{array} { c c } \hline \text { Class Limits } & \text { Frequency } \\\hline 20 \text { up to } 30 & 4 \\30 \text { up to } 40 & 7 \\40 \text { up to } 50 & 9 \\50 \text { up to } 60 & 3 \\60 \text { up to } 70 & 2 \\\text { Total } & 25 \\\hline\end{array} Find the mean of the grouped data.


Definitions:

Common Goal

A shared objective or aim that unites members of a group or team, encouraging collaborative effort.

High Failure Rate

The condition where a significant percentage of attempts or endeavors (such as projects, products, or businesses) do not meet expected success criteria within a certain timeframe.

Organization

A structured group of people who work together to achieve a particular goal or set of goals.

Succession Planning

The process of identifying and developing new leaders who can replace old leaders when they leave, retire or die.

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