Approximate the Variance and Standard Deviation of a Variable from Grouped

question 6

Multiple Choice

Approximate the Variance and Standard Deviation of a Variable from Grouped Data
-For the following data set, approximate the sample standard deviation of unused vacation days. $\begin{array}{c|c}\text { Days } & \text { Frequency } \\\hline 1-2 & 9 \\3-4 & 12 \\5-6 & 8 \\7-8 & 5 \\9-10 & 4\end{array}$

• A) \(2.6\) days
• B) \(2.5\) days
• C) \(6.5\) days
• D) \(6.6\) days

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