Vocabulary Crossword

In which type of study do You observe ?
What is it Called when You manipulate Factors?
What Variables are compared across different treatments ?
What is the proccess, intervention, or other controlled circumstance applied to randomly assigned experimental units called?
Any individual Associated With an experiment
A treatment known to have no effect
When groups of experimental units are similar
a retrospective or prospective study subjects are randomly assigned
when the levels of one factor are associated with the levels of another factor
when an observed difference is too large for us to believe
the experimental units assigned to a baseline treatment level
two main classes of individual who can affect the outcome of an experiment
those who could influence the results
to be valid an experiment must be assign experimental units to treatment groups
A varible whose levels are compared across different treatments