1. State the null and research hypothesis for each research scenario. [3pts, 1pts each]

a.A researcher is interested in studying the use of antibacterial products and the dryness of people's skin. He thinks these products might alter the moisture in skin compared to other products that are not antibacterial.

b.A student wonders if grades in a class are any way related to where a student sits in the classroom. In particular, do students who sit in the front row get better grades on average, than the general population of students?

c.Cell phones are everywhere and we are now available by phone almost all of the time. Does this translate into a change in the nature or closeness of our long distance relationships?