Question

Identify the explanatory variable and response variable in each of the studies

described here.

a.A study of cell phone use and primary brain cancer suggested that cell
phone use was not associated with an elevated risk of brain cancer.
b.Records of more than three-quarters of a million surgical procedures
conducted at 34 different hospitals were monitored for anesthetics
safety. The study found a mortality rate of 3.4% for one particular
anesthetic. No other major anesthetics were associated with mortality
greater than 1.9%.
c.In a landmark study involving more than three-quarters of a million
individuals in the United States, Canada, and Finland, subjects were
randomly given either the Salk polio vaccine or a saline (placebo)
injection. The vaccinated group experienced a polio rate of 28 per
100,000 while the placebo group had a rate of 69 per 100,000. A
third group

Answer 1

Explanation:

Answer:

a) Explanatory variable is the study of cell phone usage while the response variable is the risk of brain cancer

b) Explanatory variable is the Records of more than three-quarters of a million surgical procedures conducted at 34 different hospitals, while the response variable is the mortality rate

c) Explanatory variable is the type of treatment given (Salk polio vaccine or a saline placebo injection) while the response variable is the polio rate.

Explanation:

Explanatory variable are the variable been studied in a research while the response variable are the effects ( either positive or negative) of the explanatory variable that is studied.