A researcher wants to use simple random assignment in an experiment with two groups. Which of the following procedures might he use?
assigning every other participant to Group 1
rolling dice and assigning those with even numbers to Group 1 and those with odd numbers to Group 2
having all the participants with blonde hair in Group 1 and those with other hair colors in Group 2
match participants on a key variable, then flip a coin to determine which member of the pair is assigned to Group 1, and which is assigned to Group 2
