A condominium owner put a political candidate placard in her window. The homeowners association prohibits political signs as it can cause dissent among neighbors. The homeowner's right to keep the placard displayed is protected by

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

answer; i believe the answer is 80%, plz check first good luck;

you would times this by how many days there are in a year 365*400=$146000