A researcher is interested in examining whether exposure to "green spaces" (such as those found in nature) can influence stress levels (as measured by cortisol). Researchers place participants in a room lined with green plants for one hour and measure their stress levels before and after being in the room.

A.Null hypothesis:

B.Alternative hypothesis:

C.IVs:

D.DVs:

E.Best test to use:

F.Results Write-Up: