Now we will see how to draw Ogive curve;

For drawing the ogive curve we need to follow some steps:

Step 1: First we select two axis i.e. x and y- axis.

Step 2: In the simple frequency curves the frequency is plotted against the class interval.

Step 3: In case of cumulative frequency the frequency is plotted against the lower limit and upper limit. It depends on series which is cumulated.

For plotting the ogive curve there are two methods.

1. Less than method.

2. More than method.

When we plot the ogive curve with the help of less than method:

Step 1: We have to start from the upper limits of class intervals and then add class frequencies to get the cumulative frequency distribution.

Step 2: We take upper limit in the x-axis direction.

Step 3: And we take cumulative frequencies along the Y-axis direction.

Step 4: And now put the points (y

_{i}, g

_{i}), where ‘y

_{i}’ is the upper limit of a class and ‘g

_{i}’ is corresponding cumulative frequency.

Step 5: At last join the points which are obtained in the graph to get the ogive.

When we plot the ogive curve with the help of more than method, then we use following steps:

Step 1: In this method we start from the lower limits of class intervals and then the total frequency is subtracted from the frequency to get the cumulative frequency distribution.

Step 2: We take the lower class limits along X - axis direction in the graph.

Step 3: And we take the cumulative frequencies along Y-axis direction in the graph.

Step 4: Then put the points (y

_{i}, g

_{i}), where ‘y

_{i}’ is the lower limit of a class and ‘g

_{i}’ is corresponding cumulative frequency.

Step 5: At last join the points which are obtained in the graph to get the ogive.

With the help of these algorithms we can plot ogive curve.