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ragam (varians)
s^2 = (7-7)^2+ (7-7)^2 + (8-7)^2+ (6-7)^2+ (7-7)^2 per 5
s^2 = (0 +0+1+1+0)/5 = 2/5
simpangan baku
s = V(2/5) = 2/5 V5 <--
NB : V = akar
Semoga membantu :)
diketahui data : 7,7,8,6,7
cari rata-ratanya dulu .
6+7+7+7+8 : 5 = 7
Ragam (V) = (6-7)²+(7-7)²+(7-7)²+(7-7)²+(8-7)² : 5 = 1+0+0+0+1 : 5 =
Simpangan baku = √V = √ = ?
Hitung sendiri ya .. hehe