A new experimental drug has been approved to be tested as a treatment for Parkinson's Disease (PD). I dopa has traditionally been the drug treatment of choice in treating PD. Researchers are interested in whether the new experimental drug will improve symptoms of PD to a greater extent than L-dopa.

A) State the null and research hypotheses

b) Is this a non-directional or a directional hypothesis? How do you know?

c) The hypothetical results indicate that the new experimental drug improved
symptom. Give a conclusion.

D) The hypothetical results indicate that the new experimental drug did not improve symptoms. Give a conclusion