Why did the two techniques yield different estimates when the same baseline data were used?

In 2005, SunCoast Hospital began exploring the possibility of a satellite hospital in a fast-growing suburban area adjacent to the hospital’s existing service area. The hospital’s marketing department was given the task of determining the size of the market for hospital services in the targeted area. The decision to proceed with planning for a new facility would be dependent on identification of a population large enough to support a 50-bed hospital