Data interpretation is an art of understanding, summarizing and expressing dataset into a variety of different formats. In GRE examination Data Interpretation is based on either tabulated dataset or based on graphs.
This type of questioning is typically important because it is the only type where all the answers expected from students are available in the question itself. It’s easy and scoring topic in your quantitative syllabus.
As per the general trend, one can expect at least one set of Data Interpretation type of question in every set. A graph or table is usually accompanied with 3 to 4 question on that data set. If you pay keen attention to the strength of this type you will realize that on an average test Graph and Tabulated Dataset comprise of minimum 4 to maximum 8 questions, which accounts for 10-20% of total questions one encounters in GRE Quantitative section.
Data Tables are based on basic set theory and such questions can be easily solved using wane diagrams. On the other hand, some data tables are associated with questions on statistics e.g. mean of data set, median and mode. With practice, these questions are easy to tackle and conquer.
Graphs (Graphical Data):
In your GRE exam, you may encounter various types of graphs e.g. Pie chart, Bar graphs, segmented bar graph, line graph, scheduling table graph etc.
While solving Graph questions students should focus on 3 important parameters of the graph.
1. Unit of graph
2. Limit of each graph
3. The range of each graph
Unit of a graph is specified at the Top of every Graph i.e 1 unit = 1 million items or 1 unit = 100 students etc. without this check one should not attempt any questions that follow the graph. It has been observed that, when a question consists of more than one graph with different units of measurements, students commit silly mistakes in converting one unit to other. Limit of Graph can be observed on the Y axis in case of Line or Bar graph, while Range of the graph is observed along the x-axis.
Data Interpretation shall be taken seriously while preparing for GRE and one should solve as many different types of questions as possible.
All the best….