Approximate the Sample Variance Given the Following Frequency Distribution A)135
B)181

question 43

Multiple Choice

Approximate the sample variance given the following frequency distribution.
$\begin{array} { c c } \hline \text { Class } & \text { Frequency } \\\hline 0 - 9 & 11 \\10 - 19 & 10 \\20 - 29 & 18 \\30 - 39 & 15 \\40 - 49 & 13 \\\hline\end{array}$

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Definitions:

Experimental Group

In research, a group of subjects who are exposed to the variable under study to assess its effect, as opposed to a control group.

Control Group

In experimental research, a group of subjects that does not receive the experimental treatment, allowing for a comparison to assess the effect of the treatment.

Operationalization

The process of defining measurement criteria for abstract concepts to enable their empirical, quantitative measurement.

Abstract Concept

A theoretical idea that is not associated with any specific physical object or real entity, often requiring complex thought and understanding.