Variasi dari data 10,44,56,62,65,72,76 adalah......

jawab

xi = 10,44,56,62,65,72,76
n = 7
∑xi = 385
X = 55

s² = ∑(xi - x)²/(n)
s² = (10-55)²+(44-55)²+ (56-55)²+ (62-55)²+(65-55)²+ (72-55)²+(76-55)²/(7)
s² = (45² + 11²+ 1²+ 7²+10²+ 17²+ 11²) / (7)
s² = 2706/7 = 386,57