Line Graph – Definition & Examples A line graph is a type of a graph which show how data or information change over time.  A line graph is also known as line chart. Example: The table shows the sell of cars in a shop for five days. Draw a line graph. Example: The table shows […]

Introduction – Pie Chart   Here we will discuss in brief about construction of a Pie Chart or Pie Graph from given data. Let us see what is a pie chart or pie graph. A “pie graph or (pie chart)” is a circular chart divided into sectors, each sector represents a proportionate part of a whole. […]

Complement of a Set Definition:  The complement of a set A, is set of all elements of universal set, which are not the elements of A. Let U be the Universal set and A is subset of U, then the “Complement of A” is set of all elements of U which are not the elements of A. […]

Grouping of Data In this lesson we will learn about the grouping of data. Grouped data are data that has been organized in groups known as classes. Grouped data has been classified and a data class is group of data. Consider the marks obtain by 15 students in a history test as given below, 23, […]

Median – Definition Median is the middle value of a given distribution or group of numbers in their ascending order. OR  in simplest way, we can say that the median is the midpoint of the given set of data. Median = Middle number  Example: If we have numbers like 1, 2, 3, 4, 5. The […]

How to Find Median Value of Odd and Even Set of Data In this lesson we will learn how to calculate the median of a data set, when data set has odd and even numbers or observations. To learn the median of a data set, first we should understand what is median. (You can learn […]

Frequency Polygon  A frequency polygon is very similar to a histogram and represents the graphical form of data. A frequency polygon is used to show a cumulative frequency distribution or compare to sets of data.  In a frequency polygon the number of observations is marked at the the midpoint […]