Approximate the Variance and Standard Deviation of a Variable from Grouped

question 151

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 monthly telephone bills (in dollars) . $\begin{array}{c|c}\text { Bill (in \$) } & \text { Frequency } \\\hline 50-52 & 2 \\53-55 & 5 \\56-58 & 12 \\59-61 & 19 \\62-64 & 7\end{array}$

• A) \(\$ 3.11\)
• B) \(\$ 58.60\)
• C) \(\$ 93.12\)
• D) \(\$ 9.65\)

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