Simpangan baku dari data 10, 12, 14, 16,18 adalah..

rata rata = [tex] \frac{10+12+14+16+18}{5} [/tex] = [tex] \frac{70}{5} [/tex] = 14
simpangan baku
= [tex] \frac{| x - xi |}{ ∑data} [/tex]
= [tex] \frac{|14 - 10| + |14 - 12| + |14 - 14| + |16 - 14| + |18 - 14|}{5} [/tex]
= [tex] \frac{4 + 2 + 0 + 2 + 4}{5} [/tex]
= [tex] \frac{10}{5} [/tex]
= 2