Example : the stastistic data of the 5 kinds of drinks' sales amount

	Variance	Standard Deviation	Coefficient of Variation	Standard Score
Drink1	25,755,372,038,383.60	4,858,918.71	20.77%	1.26
Drink2	49,357,069,381,855.50	6,726,364.57	29.89%	1.59
Drink3	94,878,250,059,735.30	9,325,863.46	15.75%	1.59
Drink4	19,763,095,814,600.90	4,256,309.57	37.60%	1.66
Drink5	2,162,473,262,665.10	1,407,930.10	16.05%	1.18

The relationship between the drinks’ amount and temperatures in 2008

	Covariance	Coefficient of Correlation	Prediction (20 °C )	real amount (20.93 °C )
Drink1	16,708,807.30	87.04%	21,900,764.52	18,780,549
Drink2	18,587,647.57	69.94%	20,251,385.45	20,156,333
Drink3	28,268,961.85	76.72%	56,848,961.01	57,655,433
Drink4	14,291,341.37	84.99%	10,230,755.28	13,452,666
Drink5	(1,378,169.50)	-24.78%	8,422,760.36	8,195,125