For the Following Data Set, Approximate the Sample Standard Deviation $$\begin{array} { c | c } \text { Days } & \text { Frequency } \\\hline 1 - 2 & 9 \\3 - 4 & 12 \\5 - 6 & 8 \\7 - 8 & 5 \\9 - 10 & 4\end{array}$$

Multiple Choice

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