Question

We use numbers (or coefficients) to express the strength of a correlation. Provide an example of a correlation (name the variables) and how strong you think the relationship would be. Your example can be totally made up.

Answer 1

Example: Suppose we want to examine the effect of average number of hours of study (x) per day on the marks obtained in the final exam ( y) of a particular class.

In this example we expect the relationship between x and y is possitive.

That is the average hours of the study per day increases then the marks obtained in the final exam also increases.

Another example is the correlation between the height of the father and the height of the son. In this example we also expect that positive correlation.

Another example: The price of a particular commodity and the demand of that commodity.Here we expect correlation between them is negative.