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. contoh teknik dasar bola voli Menggunakan pengkodean ( coding) \bar x = {\bar x}_s + \left (\frac {\displaystyle \sum_ {i=1}^ {k} {f_ic_i}} {\displaystyle \sum_ {i=1}^ {k} {f_i}} \right ) \cdot p xˉ = xˉs + ⎝⎛ i=1∑k f i i=1∑k f i ci ⎠⎞ ⋅ p Keterangan: \bar x xˉ = rata-rata hitungdata berkelompok {\bar x}_s xˉs = rata-rata sementara f_i f i = frekuensi data kelas ke- i . soal leave taking kelas 7