Question

  Random assignment explain which one is correct and which one is incorrect

1. Can be achieved by flipping a coin or using a random number table/generator

2. Requires that every person in the sample has an equal probability of being assigned to any condition.

3. Is used to achieve the goal of initial equivalence

4. a & b & c are correct

5. a & c are correct

Answer 1

All the statements a, b, c are correct.

Random assignment means each unit is randomly assigned to different groups in an experiment. In order to randomly assign the units, we can take help of any chance procedure. Flipping a coin or random number generator are some of the chance procedures.

In order for a random assignment every unit must have equal chance of getting selected and equal chance of assignment.

Random assignment is used to control equivalence at the beginning of the experiment as well as to control equivalence of some variables during the experiment.