Question

4. A large supermarket chain would like to determine the effect of the size of shelf space (in square feet) on the weekly sales (in thousands) of a promotional item using a simple random sample of 28 stores. Partial output from Excel is attached. a) Use one sentence to describe the relationship between shelf space and weekly sales.

Answer 1

Dear student, please comment in the case of any doubt and I would love to clarify it.

The relation between the two variables can be determined using creating a graph between them or just by finding the correlation between them.

As data is missing here, let me show you that with some dummy data,

Here, the scatterplot follows the linear path, hence they have a linear relationship. Most of the time, it follows the linear relationship.

Finding the correlation can tell us how much they are correlated to each other.