Are cancer rates higher in one town than another, or are test scores higher in one class than another? In nursing, when might you want to know the mean differences between two or more groups?

Two or more samples are often compared when we suspect that there are differences between the groups—for example, are cancer rates higher in one town than another, or are test scores higher in one class than another?

In nursing, when might you want to know the mean differences between two or more groups?

Describe the situation  including how and why it would be used.