Experiments

Question 1

How is a control group formed?

Answer 1

•provide placebo or inactive drug
•otherwise treated exactly the same way

Question 2

What is the best graph to use for relationship between 2 discrete variables (independent)?

Answer 2

•scatter graph

Question 3

What should be considered when deciding no. of test subjects for experiment? (E.g mice)

Answer 3

•large no. to improve reliability/reduce sampling error
•ethical considerations e.g leads to death/suffering
•no. of mice related to cost/space available

Question 4

Why should you be careful to accept claim when investigating on animal?

Answer 4

•use of animal not humans do not possible to predict effect on humans
•side effects
•only tested e.g on one cell type
•may not be carried out on living organism in e.g on cells so don’t know effects

Question 5

During investigation using volunteers why should test drug be given in addition to?

Answer 5

•not ethical to replace conventional treatment
•as life of patient is at risk

Question 6

Why is log scale used for graphs?

Answer 6

•very large increase in no. = exponential