Experimental Design Flashcards
What are the two steps in making a hypothesis?
- Come up with a specific reason
- Write a testable statement
Write a hypothesis
If I study more for the test then I will get a better grade because I will know the material I’m taking a test on.
What is a control group?
The group that is not receiving the treatment
What is the % level of confidence in science?
5%
What is a treatment group?
The group that is being changed, gets compared to the control group
What is the importance of a control group?
To show the starting point or “benchmark” when comparing results
Identify a good control group for a scientific experiment
The control groups completes a book in a quiet environment with no distractions
How is length used in error bars to analyze data in a graph?
It allows someone to see the uncertainty in a data point
What is a dependent variable?
The variable that relies on the experiment to make it change (Respondant)
How is overlap used in error bars to analyze data in a graph?
It allows you to compare between means and the precision’s of them
Give an example of a dependent and independent variable in an experiment
Independent: Amount of time a student studies
Dependent: Student’s grade
What are the templates to writing a hypothesis?
- The <phenomenon, topic> (is due to, is caused by, depends on) <specific></specific>
- If <independent/manipulated variable> <increases/decreases>, then <dependent/respondent variable> <increases/decreases>
What do error bars add to samples of data?
They add variability
What is a independent variable?
It is the variable that is changed during an experiment (Manipulated)
When do you use a bar graph?
If the independent variable is grouped
When do you use a line graph?
If the independent variable is quantified or related to time
What is the difference between overlap or no overlap in error bars?
No overlap means there is a difference while overlap means there isn’t a difference
(T/F?)
Bigger error bars have less variability
False
What type of variability do smaller error bars have?
They have less variability
What type of variability do bigger error bars have?
They have more variability
