Jawabanmu

2014-04-29T10:32:28+07:00
Rataan x = (7+7+8+6+7)/5 = 35/5 = 7

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