Correlation coefficients range from -1 to +1, indicating the strength of relationships between variables. Investors use correlation coefficients for portfolio diversification to reduce risk.

Journal of the Royal Statistical Society. Series C (Applied Statistics), Vol. 40, No. 1 (1991), pp. 199-202 (4 pages) ...

View post: Amazon is selling a foldable cordless treadmill for only $128 Correlation measures the relationship of two stocks based on their returns (percentage gains or losses), not their historical ...