Ch. 2 Key Terms Flashcards
observation
A piece of information we gather using our senses including sight, hearing, smell and touch.
hypothesis
A testable idea or explanation that leads to a scientific investigation.
prediction
A logical statement about what will happen if the hypothesis is supported.
experiment
A procedure designed to test a hypothesis under controlled conditions.
variable
The factor of interest being changed or controlled.
experimental group
The group that receives the experimental treatment within the experiment.
control group
The group that does not receives the experimental treatment within the experiment.
data
The information a scientist gathers during an experiment, often in numeric form.
correlation
An association between two or more events.
statistics
The collection and classification of data that are in the form of numbers.
mean
The number obtained by adding the data for a characteristic and dividing the sum by the number of individuals.
distribution
The relative arrangement of the members of a statistical population.
probability
The chance that something will happen
sample
A group of individuals or events selected to represent the population.
risk
The probability of an unwanted outcome.
