" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Verified answer
Bab StatistikaMatematika SMP Kelas IX
n = 40
4a] mean = (2 . 10 + 3 . 9 + 5 . 8 + 10 . 7 + 12 . 6 + 4 . 5 + 4 . 3)/40
= (20 + 27 + 40 + 70 + 72 + 20 + 12)/40
= 6,525
4b] 3, 3, 3, 3, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, ,9, 9, 9, 10, 10
Posisi median = Q2 = (20 + 21)/2
= 20,5 → antara suku ke 20 dan 21
Median = (6 + 7)/2
= 6,5
4c] Posisi Q1 = (40 + 2)/4
= 10,5 → antara suku ke 10 dan 11
Q1 atau kuartil bawah = 6
Posisi Q3 = (3 . 40 + 2))/4
= 30,5 → antara suku ke 30 dan 31
Q3 atau kuartil atas = (7 + 8)/2
= 7,5
Modus = yang paling sering muncul = 6
5] n = 7
mean = 7
(3 + 3 + 4 + 2p + 1 + 8 + 9 + 9)/7 = 7
37 + 2p = 7 . 7
2p = 49 - 37
p = 12/2
p = 6
2p + 1 = 2 . 6 + 1
= 13
3, 3, 4, 8, 9, 9, 13
Posisi median = 2 . (7 + 1)/4
= 4
Median = 8
Posisi Q1 = (1 . (7 + 1))/4
= 2
Q1 = 3
Posisi Q3 = (3 . (7 + 1))/4
= 6
Q3 = 9