Question

Diketahui data 5,3,4,2,6,x,7,5,y,8,9,6,4,3,2. jika rata rata data tersebut 5, tentukan:

a. rata rata x dan y

b. median data jika diketahui y=x-5

Answer 1

data = 5,3,4,2,6,x,7,5,y,8,9,6,4,3,2
= 2,2,3,3,3,4,4,5,5,6,6,7,8,8,9
jml data = 15

5+3+4+2+6+x+7+5+y+8+9+6+4+3+2 / 15 = 5
64+x+y/15 =5
64+x+y = 75
x+y = 75-64= 11

y = x-5 = 3
x = x = 8

x+y = x+(x-5)
= 2x-5 = 11
2x=16
x=8

a. Ratarata = 8+3/2 = 5,5
b. Median data
nilai ke = 15+1/2 = 8
mediannya adalah 5