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A frequency polygon is a graphical form of representation of data. It is used to depict the shape of the data and to depict trends. It is usually drawn with the help of a histogram but can be drawn without it as well. A histogram is a series of rectangular bars with no space between them and is used to represent frequency distributions.
A frequency polygon is a closed figure that is formed by joining the top midpoints of all the rectangles of histograms using a straight line. Whereas frequency curve is a curve that is obtained by joining the top midpoints of all rectangles of a histogram using a free hand.
Frequency Distribution; Histogram; Frequency Polygon Cumulative Frequency Graph or Ogive; Construction of a Bar Diagram. Draw two perpendicular lines intersecting each other at a point O. The vertical line is the y-axis and the horizontal is the x-axis. Choose a suitable scale to determine the height of each bar.
Click here👆to get an answer to your question ️ construct a frequency polygon for the following dataclassintervals10141519202425293034frequency581294
For drawing a frequency polygon of a continuous frequency distribution, we plot the points whose ordinates are the frequencies of the respective classes and abscissae are respectively (a) upper limits of the classes (b) lower limits of the classes (c) class marks of the classes (d) upper limits of preceding classes
State true or false. The definition of a polygon is a closed figure formed by straight lines or straight sides. View Solution. Q 3.
Construct a histogram for the given data. Mark the mid point of the tops of rectangles of histogram and join these points by line segments. To complete the polygon, mark two classes (− 10 to 0) and (80 to 90). Join the end point of the line segments to the mid points of these two classes. The curve so obtained is a frequency polygon.
We will take the marks on x-axis and the cumulative frequency on the y-axis. The points to be plotted are ( 10 , 7 ) , ( 20 , 17 ) , ( 30 , 40 ) , ( 40 , 91 ) , ( 50 , 97 ) a n d ( 60 , 100 ) . Once, we join this points, we will get the required less than cumulative frequency polygon, as shown in the graph given above.
Representing cumulative frequency data on a graph is the most efficient way to understand the data and derive results. Learn more about Frequency Polygon here. There are two types of Cumulative Frequency Curves (or Ogives) : More than type Cumulative Frequency Curve; Less than type Cumulative Frequency Curve; More Than Type Cumulative Frequency ...
Mark the class intervals along the X-axis and the frequency along the Y-axis. We take the imagined classe 0 − 10 at the beginning and 90 − 100 at the end, each with frequency zero. We have tabulated the data as shown.
