Scatter graphs are a good way of displaying two sets of data to see if there is a correlation close correlationThe relationship between two sets of data. Usually described as positive or negative., or ...

Graphs can have: positive correlation; negative correlation; or no correlation. Positive correlation means as one variable increases, so does the other variable. They have a positive connection.

Despite the chant that correlation is not causation, some researchers believe the design of scatter plots nudges us to the wrong conclusions. Can a change in their design lessen that risk? Analyzing ...

If you understand the definition of a mathematical function, a good way to judge it is that any line drawn parallel to the y-axis intersects with the values in the function’s curve only once. The same ...

In this chapter you examine relationships between pairs of variables by looking at correlations. You can use correlation coefficients to measure the strength of the linear association between two ...