data dari 4,5,5,6,7,8,7,6,9,7,5,9,8,7 tentukan mean , median , jagkauan,simpagan kuartil

data diurutkan
4,5,5,5,6,6,7,7,7,7,8,8,9,9
a. mean
b. median
c. jangkauan
d. simpangan kuartal

PENYELESAIAN:
a. median =
4,5,5,5,6,6,7,7,7,7,8,8,9,9/14 = 11,14
b. median = 7+7 = 14/2 = 7
c. jangkauan = nilai maksimum - nilai minimum = 9 - 4 = 5
d. simpangan kuartil = 8 - 5/2
= 1,5