2.7 - How valid is the data?

Question 1

How do you make an investigation valid?

Answer 1

Apart from the independent variable, all variables must be controlled

Question 2

What does it mean if a measurement is repeatable?

Answer 2

If the original experimenter repeats the investigation using the same method and equipment and obtains the same results

Question 3

When is a measurement reproducible?

Answer 3

If the investigation is repeated by another person, or by using different equipment or techniques, and the same results are obtained

Question 4

What is an important factor in getting valid, repeatable and reproducible results?

Answer 4

Sample size; the larger the sample size, the more trust we can have in the data generated

Question 5

What type of results do you need to get the most out of an investigation?

Answer 5

Valid, repeatable, and reproducible