Question

Simpangan baku dari data 2,3,4,5,6,7,8 adalah?

Answer 1

Rata-rata = x = (2 + 3 + 4 + 5 + 6 + 7 + 8)/7 = 35/7 = 5
Ragam
= {(2-5)^2 + (3-5)^2 + (4-5)^2 + (5-5)^2 + (6-5)^2 + (7-5)^2 + (8-5)^2}/7
= (9 + 4 + 1 + 0 + 1 + 4 + 9)/7
= 28/7
= 4
Simpangan baku = √4 = 2