A Company Had 80 Employees Whose Salaries Are Summarized in the Frequency

Multiple Choice

A company had 80 employees whose salaries are summarized in the frequency distribution below. Find the standard deviation. $\begin{array}{r|c}\text { Salary (dollars) } & \text { Employees } \\\hline 5,001-10,000 & 19 \\10,001-15,000 & 14 \\15,001-20,000 & 12 \\20,001-25,000 & 16 \\25,001-30,000 & 19\end{array}$

A) $\$ 7967.5$
B) $\$ 7588.1$
C) $\$ 8195.1$
D) $\$ 8422.8$