Stage 6 started the slow and painful recapturing of the capital seoul, which then turned into a stalemate. gen. ridgway and his troops referred to this stage of the war as the “meat grinder.” explain the use of this term and its implications.

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.