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The Following Frequency Distribution Shows the ACT Scores of a Sample

Question 22

Essay

The following frequency distribution shows the ACT scores of a sample of students:  Score  Frequency 14−18219−23524−281229−331\begin{array} { l r } \text { Score } & \text { Frequency } \\14 - 18 & 2 \\19 - 23 & 5 \\24 - 28 & 12 \\29 - 33 & 1\end{array} For the above data, compute the following.
a.
The mean
b.
The standard deviation

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