<p>A. 3,4,4,4,5,6,6,6,7,8,8,9</p><p>-Modus= 4 dan 6</p><p>-median= 6+6÷2= 6</p><p>-mean= 3+4+4+4+5+6+6+6+7+8+8+9÷12= 5,83</p><p>- jangkauan= x maks - x min</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 9-3= 6</p><p>- kuartil&nbsp;</p><p>Q1= 4 &nbsp;Q2= 6 &nbsp;Q3= 8</p><p>- jangkauan kuartil= Q3-Q1</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 8-4= 4</p><p>- simpangan kuartil= 1/2 (Q3-Q1)&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 1/2×4= 2</p><p>&nbsp;</p><p>B. 50,50,60,65,65,65,65,70,75,80,80,85,85,90</p><p>-modus= 65</p><p>-median= 65+70/2= 135/2= 67,5</p><p>- mean= 50+50+60+65+65+65+65+70+75+80+80+85+85+90÷12= 82,08</p><p>-jangkauan= x maks - x min</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 90-50=40</p><p>- kuartil</p><p>Q1= 60+65/2= 62.5&nbsp;</p><p>Q2= 67,5&nbsp;</p><p>Q3= 80+85/2= 82.5</p><p>-jangkauan kuartil= Q3-Q1</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 82.5-62.5= 20</p><p>- simpangan kuartil= 1/2 (Q3-Q1)&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 1/2×20= 10</p>