tentukan mean,median,modus dan jangkauan interkuartil dari data: a.3,5,2,6,5,9,5,2,8,6 b.15,7,13,11,16,10,13,9,8,10,16

a) mean
x = (2 × 2) + (1 × 3) + (3 × 5) + (2 × 6) + (1 × 8) + (1 × 9) / (2 + 1 + 3 + 2 + 1 + 1)
x = (4 + 3 + 15 + 12 + 8 + 9 ) / 10
x = 56 / 10
x = 5,6

median
jumlah frekuensi = 10
median =( nilai ke 5 + ke 6) ÷ 2 = (5 + 5) ÷ 2 = 5

modus = 5
jangkauan interquartil

urutan data = 2 ; 2 ; 3 ; 5 ; 5 ; 5 ; 6 ; 6 ; 8 ; 9
Qr = Q3 - Q1
= (6+8/2) - (2+3/2)
= (14/2) - (5/2)
= 7 - 2,5
= 4,5

b) mean
x = ( 7 + 8 + 9 + 10 + 10 + 11 + 13 + 13 + 15 + 16 + 16 ) / 11
x = 128 / 11
x = 11,6

median
jumlah frekuensi = 11
median nilai ke 6 = 11

modus = 10 ; 13 ; 16

jangkauan interquartil
Qr = Q3 - Q1
= 15 - 9
= 6