A key weakness of using statistical planning models (such as trend analysis) to predict labor demand is: Group of answer choices They rely on subjective data, such as the opinions of company leaders and management; which decreases the reliability and effectiveness of the predictions. They will always be less effective than the "best guesses" of experts (such as company leaders and managers). They use past data to predict future needs; and in many organizations, there are so many "unpredictable" factors in the labor market that statistical models cannot fully capture them. They consider too many variables in making predictions; which makes the mathematical formula for computation too complex