ch. 2 key terms Flashcards
observation
The process of obtaining information by using the senses; the information obtained by using the senses.
hypothesis
(hie PAHTH uh sis) A testable idea or explanation that leads to scientific investigation.
prediction
A statement of the expected results of the experiment based on the hypothesis.
experiment
A procedure that is carried out under controlled conditions to discovered, demonstrate, or test a fact, theory, or general truth.
variable
Anything that can change or be changed.
experimental group
In an experiment, a group that is identical to a control group except for one factor and that is compared with the control group.
control group
In an experiment, a group that serves as a standard of comparison with another group to which the control group is identical except for one factor.
data
Any pieces of information acquired through observation or experimentation.
correlation
The linear dependence between two variables.
statistics
Science concerned with developing and studying methods for collecting, analyzing, interpreting and presenting empirical data.
distribution
The relative arrangement of the members of a statistical population; usually shown in a graph.
probability
Used to measure the chance or likelihood of an event to occur
conceptual model
A verbal or graphical explanation for how a system works or is organized.
mathematical model
One or more equations that represent the way a system or process works.
value
Risk is the combination of probability of an event and its consequences
