What,if anything,is wrong in this control chart? Explain briefly. 
Definitions:
Independent Variable
The variable in an experiment that is manipulated or changed to observe its effects on the dependent variable.
Interaction Effect
A statistical phenomenon where the effect of one independent variable on a dependent variable varies depending on the level of another independent variable.
Random Sample
A subset of a population selected through a method where every individual has an equal chance of being chosen, ensuring the representativeness of the sample.
Target Population
The entire group of individuals or instances about whom the research is focused and to whom the researcher wishes to generalize the study findings.
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