Below You Are Given a Sample of ACT Scores of 12

Essay

Below you are given a sample of ACT scores of 12 college applicants. $\begin{array} { l l } 19&23&27&21&32&17&20&29&22&30&25&15 \end{array}$
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a.
Determine the first quartile.
b.
Determine the 75^th percentile.
c.
Determine the interquartile range.