Unit 3.3b

Question 1

What’s a control?

Answer 1

Experiment set up to show that any effects are the results of the treatment

Question 2

What’s a controlled variable?

Answer 2

Variables that may influence the dependent variable should remain constant throughout the experiment

Question 3

What’s sample size?

Answer 3

Large enough to allow a valid conclusion that the independent variable did have an effect on the dependent variable

Question 4

What’s repetition?

Answer 4

Carrying out the experiment again at a different time with new ingredients to determine reliability

Question 5

What’s selection bias?

Answer 5

Where individuals, groups or data are not selected randomly, therefore failing to provide a representative sample