Quantitative Aptitude: Basics of Bar Charts

Quantitative Aptitude: Basics of Bar-charts

Quantitative Aptitude: Basics of Bar Charts

Last Updated on Nov 2, 2109

A bar chart or bar graph is a chart/graph that presents categorical data with rectangular bars with heights or lengths proportional to the values that they represent. The bars can be plotted vertically or horizontally. A vertical bar chart is also called a line graph.

A bar graph shows comparisons among discrete categories. One axis of the chart shows the particular categories being compared, and the other axis represents a measured value. Some bar graphs present bars clustered in groups of more than one, showing the values of more than one measured variable

Bar graphs/charts provide a visual presentation of categorical data. Categorical data is a grouping of data into discrete groups, such as months of the year, age group, shoe sizes, and animals. These categories are usually qualitative. In a column bar chart, the categories appear along the horizontal axis; the height of the bar corresponds to the value of each category.

Types of Bar Charts
  • Grouped Bar Graphs
  • Stacked Bar Graphs

Grouped Bar Graphs

In a grouped bar chart, for each categorical group, there are two or more bars. The bars are color-coded to represent a specific grouping. For example, a business owner with two studios might make a grouped bar chart with different colored bars to represent each studio: the horizontal axis would show the months of the year and the vertical axis would show the revenue. Usually, a grouped bar graph presents the information in the same order in each grouping.

Stacked Bar Graphs

In a stacked bar chart, bars that represent different groups on top of each other. The height of the resulting bar shows the combined result of the groups. However, stacked bar charts are not suited to data sets where some groups have negative values. In such cases, a grouped bar chart is preferable. Usually stacked bar graphs present the information in the same sequence on each bar.

This video lays out the basics of Bar-charts uder Data Interpretation section. Understanding this topic well is necessary to solve questions that are asked in various competitive exams in the Data Interpretation section - applicable to CAT, XAT, MAT, SNAP, IIFT, CLAT, AILET, DU LLB, any other entrance exam as well. For more such content, visit our website - examvictor.com

We hope this video was helpful and if you liked this video, you can check more videos here. Please let us know your views in the comment section below.

Leave a Reply

Your email address will not be published. Required fields are marked *