A statistician collects data on production of rice from 1990 to 20 2 0 and classifies it year wise. Which of the following type of classification of data has the statistician done?  

Chronological classification is when the data is classified on the basis of time and arranged chronologically or historically. It is also known as temporal or historical classification. When data is classified area-wise, such as states, towns etc, it is geographical or spatial classification. Qualitative classification is data that is classified on the basis of attributes or characteristics like small, large, etc. It can be simple or manifold classification. Quantitative classification is data classified in terms of magnitude. For example, data classified on the basis of height of crops.