AP Bio FRQ experimental design cheat sheet
This cheat sheet provides key concepts and strategies for designing experiments in AP Biology, focusing on cell biology. It includes essential terms, processes, and methodologies that are critical for understanding experimental design and analysis in the AP curriculum.
Quiz(24 pytania)
1. What does it mean if a result has a p-value of 0.03?
Pojęcia w tym zestawie(24)
Experimental Design Fundamentals(12)
Define independent variable.
The variable that is manipulated in an experiment to test its effects.
What is a control group?
A group that does not receive the treatment; used for comparison.
True or False: More trials increase reliability.
True - More trials reduce random error and increase validity.
Fill in the blank: Replication is essential for __________.
validating results and ensuring accuracy.
Compare dependent and independent variables.
Independent variable: manipulated; Dependent variable: measured response.
Example of a hypothesis: If I water plants more, then __________.
they will grow taller due to increased hydration.
What role does replication play in experiments?
It allows for verification of results and reduces variability.
True or False: Randomly assigning subjects removes bias.
True - It ensures each subject has an equal chance, enhancing validity.
Difference between qualitative and quantitative data.
Qualitative: descriptive data; Quantitative: numerical data.
What is a confounding variable?
An extraneous variable that could affect the outcome of the experiment.
State the purpose of a placebo group.
To control for psychological effects; subjects believe they are receiving treatment.
Calculate the mean of these numbers: 5, 10, 15.
Mean = (5 + 10 + 15) / 3 = 10.
Data Collection and Analysis(12)
What is statistical significance?
A result is statistically significant if the probability of it occurring by chance is less than 5% (p < 0.05).
Define experimental error.
Experimental error refers to the variability in data caused by factors affecting measurements. Types: - Random error - Systematic error
True or False: All data must be normally distributed.
False: While many statistical tests assume normality, others can be used for non-normal data.
Fill in the blank: The __________ is a measure of how spread out data is.
Standard deviation.
What is a control group?
A control group is a baseline that does not receive the experimental treatment, allowing comparison with the experimental group.
List two methods of data collection.
- Surveys - Observations
Calculate the mean of: 10, 20, 30.
Mean = (10 + 20 + 30) / 3 = 20.
What does a p-value indicate?
A p-value indicates the probability that the observed results occurred by chance; lower values suggest stronger evidence against the null hypothesis.
Compare qualitative and quantitative data.
Qualitative data describes characteristics (e.g., color), while quantitative data involves numerical measurements (e.g., height in inches).
What is the purpose of replication in experiments?
Replication increases the validity and reliability of results by ensuring that findings are consistent across multiple trials.
Cause → Effect: Outlier in data.
An outlier can skew the results, leading to misleading interpretations of data trends.
List three types of descriptive statistics.
- Mean - Median - Mode
Pytania w tym zestawie(24)
1. What does it mean if a result has a p-value of 0.03?
2. What is the primary purpose of an independent variable in an experiment?
3. Which of the following best describes systematic error?
4. Which group in an experiment receives the treatment under investigation?
5. Which of the following is NOT a method of data collection?
6. True or False: A confounding variable can lead to incorrect conclusions in an experiment.
7. What is the median of the following data set: 3, 7, 9, 2, 5?
8. Which of the following best describes replication in experimental design?
9. Which type of data would be best for measuring the height of plants in inches?
10. Fill in the blank: The dependent variable is the variable that is __________.
11. What is the role of the control group in an experiment?
12. Which of the following is NOT a characteristic of a good hypothesis?
13. In which situation would you apply replication in an experiment?
14. In an experiment testing the effect of sunlight on plant growth, what would be an example of the control group?
15. What is the primary purpose of descriptive statistics?
16. What distinguishes qualitative data from quantitative data?
17. Which of the following statements about outliers is correct?
18. What is the purpose of a placebo in an experimental study?
19. How do you calculate the standard deviation of the data set: 4, 8, 6, 5?
20. True or False: Random assignment helps eliminate biases in the selection of participants for study groups.
21. What is the primary factor in determining statistical significance?
22. Calculate the median of these numbers: 3, 7, 9, 12, 15.
23. Which of the following is a characteristic of qualitative data?
24. Which aspect of experimental design is crucial for ensuring that the results can be generalized to a larger population?
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