Answer:
A prospective cohort study
Explanation:
A prospective cohort study -
It is a longitudinal study which a group of people with certain differences are studied , in order to determine how various factors affect the rate of the outcomes .
This method is adapted for studying various diseases , this method is a long run method , which is done for years to have complete and brief knowledge .
hence , from the question , Cancer study is done on the 3,000 adults of Baltimore , showing the example of a prospective cohort study .
It would be cheaper in 2013 because 1$ is worth more rupees. Another reason might be because the tablet is an old product and is worth less.
Answer: Correlational study
Explanation: Correlational study is used to discover if there is a relationship or association between two variables. It establishes a degree of statistical dependence of one variable on the other and vice-versa.
In the question cited above correlational study was used to establish that there exist a relationship between Grade Point Average (GPA) and Alcohol Consumption and hence resulted in a Negative or inverse statistical relationship as a higher value of alcohol consumption tends to be associated with lower values of Grade Point Average (GPA).
Starvation, poverty, and not a lot else
