1.3 Flashcards
Write a hypothesis for a scenario in which termites follow lines drawn with pen but not lines in the same colors drawn with marker or pencil.
Termites follow lines drawn with pen rather than other material because they navigate by smell and follow the scent of chemicals in the ink.
What is a dependent variable?
The variable that is measured and is affected by the independent variable in an experiment.
What is an independent variable?
The variable that is manipulated or changed in an experiment.
What is a control group?
A group that is meant to be the standard that the other experimental groups are compared to.
Why are control groups important?
Control groups are important because they show the difference between the group that is having the independent variable manipulated and a group that doesn’t have any part of the manipulation.
In a clinical trial to show the effectiveness of a certain medicine, what would be an ideal control group?
A group of people from the same demographics as the rest of the experiment that take a placebo sugar pill.
What does it mean if error bars on a graph do not overlap?
The difference between the averages is probably significant.
What does it mean if error bars on a graph do overlap?
If error bars on a graph overlap, it means that the difference is probably not statistically significant.
