Perhatikan data berikut: Kuartil bawah, median dan kuartil atas data tersebut berturut-turut adalah ...

<p>Jawaban : 139, 141, 143</p><p>&nbsp;</p><p>Rumus kuartil data genap</p><p>▪️ Kuartil bawah: Q1 = x_(1/4 (n+2))</p><p>▪️ Median: Q2 = 1/2 [x_(n/2) + x_(n/2 + 1)]</p><p>▪️ Kuartil atas: Q3 = x_(3/4 (n+2) - 1)</p><p>&nbsp;</p><p>dimana x_n: data ke-n</p><p>&nbsp;</p><p>Diketahui data terurut dengan</p><p>n = 10 + 7 + 14 + 9 + 6 + 11 + 7 = 64</p><p>&nbsp;</p><p>Kuartil bawah:&nbsp;</p><p>Q1 = x_(1/4 (n+2))<br>= x_(1/4 (64+2))</p><p>= x_(1/4 (66))</p><p>= x_16,5</p><p>= (x_16 + x_17)/2</p><p>= (139 + 139)/2</p><p>= 139</p><p>&nbsp;</p><p>Median</p><p>Q2 = 1/2 [x_(n/2) + x_(n/2 + 1)]</p><p>= 1/2 [x_(64/2) + x_(64/2 + 1)]</p><p>= 1/2 [x_(32) + x_(32 + 1)]</p><p>= 1/2 [x_(32) + x_(33)]</p><p>= 1/2 (141 + 141)</p><p>= 141</p><p>&nbsp;</p><p>Kuartil atas:</p><p>Q3 = x_(3/4 (n+2) - 1)</p><p>= x_(3/4 (64+2) - 1)</p><p>= x_(3/4 (66) - 1)</p><p>= x_(49,5 - 1)</p><p>= x_(48,5)</p><p>= (x_48 + x_49)/2</p><p>= (143 + 143)/2</p><p>= 143</p><p>&nbsp;</p><p>Jadi, kuartil bawah, median, dan kuartil atas berturut-turut adalah 139, 141, 143.</p>