Question

Define/Explain the concepts.

1) Simple Bar Diagram

2) Pie Diagram

3) Histogram

4) Percentage Bars.

Answer 1

1. A simple bar diagram comprises a group of rectangular bars for each class of data. They are one-dimensional diagrams in the sense, that it is only the height of the bars that matters and not the width. The height of the bars in the diagram differs according to the values of different variables while the width of different bars remains the same.

2. A pie diagram is a circular chart or diagram that is further dissected into parts representing different components of the given data. Each segment or part represents an item of the given data set. The area of each part (or central angle) is proportional to the quantity (or information) it represents.

3. Histogram is a form of representing the frequency distribution of any attribute or variables. It is a two dimensional figure that depict the frequency distribution of a continuous series by the means of rectangles. Here, adjacent rectangles are prepared consisting of length as well as breadth. The width and height of the rectangles determine the class interval and class frequency, respectively.

4. Percentage bars are used to the represent a given set of data in the form of percentages. The length of each bar diagram is kept 100%. After this, the value of the variable is measured in terms of the cumulative percentage and the segments are represented in the form of bars.