Lanjutan Statistika (Kelas XII Wajib)

A. Ukuran Data Memusat

\color{blue}\begin{array}{|c|l|l|l|}\hline \textrm{No}&\: \: \qquad\textrm{Istilah}&\qquad\textrm{Data Tunggal}&\quad\textrm{Data Berkelompok}\\\hline 1.&\textrm{Mean/rataan}&\bar{x}=\displaystyle \frac{\sum_{i=1}^{n}x_{i}}{n}&\bar{x}=\displaystyle \frac{\sum_{i=1}^{k}x_{i}f_{i}}{\sum_{i=1}^{k}}\\\hline &\textrm{Rataan Sementara}&\bar{x}=\bar{x}_{s}+\displaystyle \frac{\sum d_{i}}{n}&\bar{x}=\bar{x}_{s}+\frac{\sum f_{i}d_{i}}{\sum f_{i}}\\\hline &\textrm{dengan pengkodean}&&\bar{x}=\bar{x}_{s}+c\left ( \displaystyle \frac{\sum_{i=1}^{k}f_{i}u_{i}}{\sum_{i=1}^{k}f_{i}} \right )\\\hline 2.&\textrm{Modus}&x_{\textit{sering muncul}}&Mo=t_{b}+c\left ( \displaystyle \frac{d_{1}}{d_{1}+d_{2}} \right )\\\hline 3.&\textrm{Median}\rightarrow n\: ganjil&Me=x_{\frac{n+1}{2}}&Me=t_{b}+c\left ( \displaystyle \frac{\frac{1}{2}n-f}{f} \right )\\\hline &\textrm{Median}\rightarrow n\: genap&Me=\displaystyle \frac{1}{2}\left ( x_{\frac{n}{2}}+x_{\frac{n}{2}+1} \right )&Me=t_{b}+c\left ( \displaystyle \frac{\frac{1}{2}n-f}{f} \right )\\\hline \end{array}.

Sebagai tambahan

\colorbox{yellow}{\LARGE\fbox{CONTOH SOAL}}.

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