Ch.2 Key terms Flashcards
observation
a piece of information we gather using our senses(sight, hearing, smell, and touch).
hypothesis
a testable idea or explanation that leads to 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 in an experiment
experimental group
the group that receives experimental treatment.
control group
the group that did not receive experimental treatment
data
the information that a scientist gathers during an experiment, which is often in numeric form, is data
correlation
association by 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 is called probability
sample
a group of individuals or events selected to represent the population
risk
risk is the probability of an unwanted outcome
