09
Dec
Cumulative Frequency Curve For Grouped Data. Take a graph paper and mark the upper-class limits along the x-axis and the corresponding cumulative frequencies along the y-axis. The point in which both the curve intersects corresponding to the x. Cumulative-Frequency Curve Group data are also represented by a curve called ogive or cumulative-frequency curve. To calculate the cumulative frequencies add the frequencies together.
Representing cumulative frequency data on a graph is the most efficient way to understand the data and derive results. If both less than and greater than cumulative frequency curve is drawn on the same graph we can easily find the median value. Lets find the cumulative frequencies for a few categories in our example. As the name suggests in this representation cumulative frequencies of different class intervals play an important role. Note that the cumulative frequency of the first category equals the categorys individual frequency. Ogive Graph or the cumulative frequency graphs are used to find the median of the given set of data.
Representing cumulative frequency data on a graph is the most efficient way to understand the data and derive results.
Mode. Take a graph paper and mark the upper-class limits along the x-axis and the corresponding cumulative frequencies along the y-axis. Method of Constructing on Ogive. Mode. Taking a simple example. For grouped data class mode or modal class is the class with the highest frequency.