Use the Grouped Data Formulas to Find the Indicated Mean

question 96

Multiple Choice

Use the grouped data formulas to find the indicated mean or standard deviation.
-For the following data set, approximate the sample standard deviation. 422 $$\begin{array} { c | c } \text { Miles (per day) } & \text { Frequency } \\\hline 1 - 2 & 9 \\3 - 4 & 22 \\5 - 6 & 28 \\7 - 8 & 15 \\9 - 10 & 4\end{array}$$ 29
628
815

• A)2.1
• B)5.1
• C)2.9
• D)1.6

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