Suppose a Researcher Wants to Determine If the Size of the Observing

Multiple Choice

Suppose a researcher wants to determine if the size of the observing crowd to some emergency situation is relevant to whether the victim will receive help.The researcher randomly assigns participants to one of three groups: no other bystanders,one other bystander,or four other bystanders.When an emergency is then staged,the researcher measures how long it takes the participant to help the victim.In this study,what is the independent variable?

A) Number of bystanders
B) The group with four other bystanders
C) The group with one other bystander
D) The group with no other bystanders