Time-series data analysis includes ________.
◦ using a variety of time periods to measure the dependent variable of the same entity (organization, plant, or activity)
◦ using the highest and lowest observation for the same entity (organization, plant, or activity)
◦ observing different entities during the same time period for the same entity (organization, plant, or activity)
◦ comparing information in different cost pools for the same entity (organization, plant, or activity)