Find the Standard Deviation of the Data Summarized in the Given

Multiple Choice

Find the standard deviation of the data summarized in the given frequency distribution.
-The heights of a group of professional basketball players are summarized in the frequency distribution below. Find the standard deviation. Round your answer to one decimal place. $\begin{array}{l}\text { Height (in.) Frequency }\\\begin{array}{lr}70-71 & 3 \\72-73 & 7 \\74-75 & 16 \\76-77 & 12 \\78-79 & 10 \\80-81 & 4 \\82-83 & 1\end{array}\end{array}$

A) 3.3 in.
B) 3.2 in.
C) 2.9 in.
D) 2.8 in.