The document discusses a data table showing a pizza parlor's advertising expenditures and sales over 8 quarters. The marketing manager wants to understand the impact of current advertising on sales two quarters in the future. To analyze this, a regression can be run using sales as the dependent variable and advertising expenditures lagged by two quarters as the independent variable. This regression would use 8 data points, as that is the maximum amount of data provided in the 8 quarter table.