Question

Simpangan baku dari 7,3,5,4,6,5 adalah

Answer 1

Cari rata-rata x = (7 + 3 + 5 + 4 + 6 + 5)/6 = 30/6 = 5

ragam = [(7-5)²+(3-5)²+(5-5)²+(4-5)²+(6-5)²+(5-5)²]/6

           = [4 + 4 + 0 + 1 + 1 + 0]/6 = 10/6 = 5/3

simpangan baku = akar dari ragam