Question

Hasil tes pelajaran matematika 14 orang siswa adalah sebagai berikut :
30, 45, 55, 60, 60, 65, 85, 75, 75, 55, 60, 35, 30, 50. jangkauan semi inter quartil (qd) data tersebut adalah...

Answer 1

30,30,35,45,50,55,55,60,60,60,65,75,75,85
q1 = n+1 / 4 = 14+1 / 4 = 15/4 = d3 3/4
= d3+3/4(d4-d3)
= 35 + 3/4 (45-35)
=35+7,5 =42,5

q3 = 3(n+1)/4 = 3(14+1)/4 = 3(15)/4 = 45/4 =d11 1/4
=d11 + 1/4 + (d12-d11)
=65 + 1/4 + (75-65)
=65+1/4+10
=65 + 2.5 = 67,5

qd= 67,5-42,5 = 25

tapi ga tau juga siy