11.2

Question 1

What is epidemiology? (3)

Answer 1

(1) the study of incidence …
(2) and pattern of a disease …
(3) with a view to finding the means of preventing & controlling it

Question 2

What is correlation? (2)

Answer 2

(1) when a change in one variable is reflected
(2) by a change in the other variable

Question 3

Correlation does not mean _____________ (1)

Answer 3

causation

Question 4

What questions should be asked when deciding how reliable a piece of data is? (5)

Answer 4

(1) Have the correct questions been asked?
(2) How was the data gathered? Was the right apparatus used? (3) Do those collecting the data have a vested interest in the outcome of the research?
(4) Has the study been repeated with the same results & conclusions by other ppl?
(5) Are there still unanswered questions?