Ricardo has been feeling gloomy and generally discontented ever since the semester ended two weeks ago. When he received his transcript in the mail and discovered that the lowest grade he got was a B , he felt elated and overjoyed. Ricardo's two states (pervasive gloominess and sudden intense joy) illustrate the difference between and .

1. government controls industry through policy

2.government is both a consumer and a producer

4. government can use policy t influence economy

i did this!

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; ///the above statement is (false);