As a marketing manager, Nicole wanted to know whether the packaging of their new lip balm affected the number of units sold. She decided to conduct an experimental research study. What type of variable is systematically controlled or manipulated by the researcher and is believed to predict change in the outcome? Group of answer choicesControl variablesIndependent variablesDependent variablesExtraneous variables

Which variable do researchers manipulate in experimental design?Question 3Answera.outcome variableb.independent variablec.dependent variabled.sample.

In experimental research, the independent variable is manipulated or changed by the experimenter to measure the effect of this change on the dependent variable.  Group of answer choicesTrueFalse

The ________ variable in an experiment is an attribute that is manipulated by an experimenter under controlled conditions.Multiple Choiceconfoundingquantitativeoutcomeindependent

A group of students wanted to investigate the effect of different concentrations of a sports drink on Daphnia.  Design an investigation to test the research statement. Your answer should include the following:Independent variabledependent variablethree control variablesprocedure and manipulation of variablesmethod of recording of dataethical considerations

Explain the importance of controlling variables for the validity of an experiment.