Which development in the 1970s facilitated the emergence of new multivariate statistical methods in epidemiology?

• A. Evolution of mobile computing networks enabled data collection
• B. The invention of the internet sped up collaboration
• C. Evolution of microcomputer technologies allowed new multivariate statistical methods to develop
• D. The rise of spreadsheets changed data analysis

Answer: (C)

The key idea is that advances in computing power and accessible software in the 1970s made it practical to develop and apply more complex statistical methods. Microcomputer technologies brought affordable, personal computing to researchers, enabling iterative algorithms, larger datasets, and faster analysis. This created the environment for new multivariate techniques to be developed and routinely used in epidemiology, as researchers could estimate and validate models that consider multiple variables at once.

Other options don’t fit as well because the broader communication networks or early online collaboration didn’t directly drive the creation of new statistical methods, and spreadsheets, while helpful for data handling, did not on their own spur the development of multivariate methodologies in that era.