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Answer this question in relation to the principles of experimentation - Leaving Cert Biology - Question 2 - 2020
Question 2
Answer this question in relation to the principles of experimentation. A scientist carried out a trial, to investigate the effect of herbal (plant) extract on the r... show full transcript
Worked Solution & Example Answer:Answer this question in relation to the principles of experimentation - Leaving Cert Biology - Question 2 - 2020
Step 1
What is the purpose of carrying out an experiment?
Answer
The main purpose of carrying out an experiment is to test the hypothesis or to investigate a prediction related to a specific idea. This allows researchers to gain insights into the relationship between variables under controlled conditions.
Step 2
Step 3
Step 4
Give two reasons why the method of selecting the participants reduces the reliability of the results.
Answer
- The selection of participants was not random and could include biases, as they were all friends, which might influence their responses.
- The sample size is too small, consisting of only ten participants, which limits the generalizability of the results.
Step 5
Using examples from the text, give two ways to show how the experimental design could be improved.
Answer
- Extend the duration of the experiment to monitor recovery over a longer period for more accurate results.
- Ensure that the same volume of liquid is administered to all participants in each group to standardize the treatment.