1. Explain how the investigation of the crime scene may have influenced the many trials and retrials.
2. What do you think investigators could have done differently to have obtained more
reliable evidence?
Amanda Knox Case Study

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .

The answer is d.potassium