2.7 How Valid is the Data?

Question 1

Why can investigations about the distribution of organisms in the environment be very difficult?

Answer 1

Because they are often done over a long period of time and not all variables can be controlled

Question 2

What is a valid investigation?

Answer 2

Where all the possible variables are controlled

Question 3

What is repeatable?

Answer 3

If the original experimenter does the experiment again with the same method and equipment and gets the same results

Question 4

What is reproducible?

Answer 4

If the investigation is repeated by another person or by using different equipment and they achieve the same results

Question 5

What may happen if the sample size is too small?

Answer 5

The data may not be representative