A bond is simply a deed (a deed being a document in writing on paper which is signed, sealed, and delivered ...) whereby one person undertakes to pay a specified sum of money to another, either immediately or at a future date.
Correlation is a statistical measure (expressed as a number) that describes the size and direction of a relationship between two or more variables. A correlation between variables, however, does not automatically mean that the change in one variable is the cause of the change in the values of the other variable. Causation indicates that one event is the result of the occurrence of the other event; i.e. there is a causal relationship between the two events.
If there is a correlation, then sometimes we can assume that the dependent variable changes solely because the independent variables change. This is where the debate between correlation and causation occurs. However, there is a difference between cause and effect (causation) and relationship (correlation).raph 1 is called a positive correlation, where the dependent variables and independent variables in a data set increase or decrease together. This means that there is a positive relationship between the number of sweaters sold at Brandy's store and the frequency of illnesses that occur with Brandy's coworkers.