In an experiment to compare two treatments, the advantage of random allocation is:Group of answer choicestreatments are assigned according to the characteristics of the subjects.the sample is representative of a known population.the likely size of errors can be estimated.the two groups will be similar, apart from the treatment.the researcher will not know what treatment the participant will receive before recruiting them into the study.

You flip a coin. If heads comes up the next person is in the treatment group. If it comes up tails, the next person is assigned to the control group. You areMultiple choice question.using random assignment in an experiment.using arbitrary assignment in an experiment.using random assignment in a correlational study.using arbitrary assignment in a correlational study.

Random assignment is a procedure for assigning participants in an experiment to either the treatment or control groupMultiple choice question.based on the preference of the participant.based on what group the previous participant was assigned to.on the basis of chance, like the flip of a coin.based on a specific pattern picked by the experimenter in advance.

In survey research, random ___________________ is typically used to ensure that a sample is representative, while in experiments random __________ is used to balance differences between participants across the various experimental groups. assignment; sampling sampling; appointment appointment; assignment A. sampling; assignment

Which of the following best describes a research study that randomly assigns people to different conditions and carefully controls all the other circumstances so that they will be equivalent across the two conditions?experimentcorrelationsurveyobservation

Which of the following is an extremely important design element to have in an experimental study? Check all that apply. Treatments that are imposed by the experimenter A placebo Groups which are exactly the same size Randomized selection of participants