Which of the following data actions can be considered as preparatory steps before conducting a forecast?

The selection of regression analysis and data cleansing as preparatory steps before conducting a forecast is appropriate because both activities are critical in ensuring the quality and relevance of the data being used for forecasting.

Data cleansing involves the processes of identifying and correcting errors or inconsistencies in the dataset. This may include removing duplicates, correcting inaccuracies, and handling missing values, all of which help to enhance the reliability of the data. When the data is clean and reliable, the forecasting models can produce more accurate predictions.

Regression analysis, on the other hand, is a statistical method used to understand the relationships between variables. In forecasting, it can help identify trends and patterns in historical data, which serves as the basis for making future predictions. By applying regression analysis, a data analyst can assess how different factors might influence the outcome and adjust the model accordingly.

Together, these steps create a solid foundation for a forecasting process, ensuring that forecasts are made based on clear, robust, and well-understood data relationships. The effectiveness of any forecasting model heavily relies on the quality of the input data and the understanding of underlying patterns, making the combination of data cleansing and regression analysis particularly relevant preparatory steps.