Every time you and your friend study for an exam while listening to classical music, both of you do well on the exam. what testable hypothesis can you develop from your observations?

Development of testable hypothesis from observation

                                     According to one theory “listening to Mozart music induce short improvement in certain kinds of cognitive task”.  Study have shown a proposed link in improving the reasoning and visualization of students during examination in the presence of classical music. It means there is relationship between classical music and man hormonal system. Therefore, listening to classical music raise dopamine and treating depression level. It leads to better performance in examination.  

                                 Silveraja et al. (2015) studied the effect of classical music on examination performance while students solving their papers in examination hall. He concluded that in the presence of music the performance was better.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."