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Covariance measures how2 variables move together. Eg. consider2 securities A and B. How the return of A & B are moving together. That is what Covariance measures. Covariance is measured as Standard Deviation of A * Standard Deviation of B * Correlation Coefficient. It can be +ve or -ve.. It can take any value depending upon the relationship between variables.
Correlation is the measure of linear dependance between2 variables. It can vary from -1 to0 to +1. A correlation coefficient of -1 indicated perfect negative relationship i.e. if one variable increases the other variable decreases (Consider savings and expenses at constant income) and and a correlation coefficinet of +1 indicates perfect posive relationship, in other words, if one variabl increases the other variable also inreases (Consider income and savings at constant expenses)
هل تحتاج لمساعدة في كتابة سيرة ذاتية تحتوي على الكلمات الدلالية التي يبحث عنها أصحاب العمل؟