Match the statistical techniques used in HR forecasting (in the left column) with their descriptions (in the right column). Drag and drop application. trend analysis trend analysis drop zone empty. ratio analysis ratio analysis drop zone empty. regression analysis regression analysis drop zone empty. It uses data from previous sales figures or other operational data to predict expected head count. It is useful when organizations have data mostly on historical staffing levels with less detailed information on specific predictors. It takes multiple factors into account simultaneously and makes more statistically precise estimates of future expectations compared to ratio and trend analyses