To get an adjusted or smoothed frequency we add the frequency of a class interval with the two adjacent intervals, just below and above the class interval. A method and device for the pictorial representation of space-related data, for example, geographical data of the earth. The frequency polygon is a frequency graph which is drawn by joining the coordinating points of the mid-values of the class intervals and their corresponding frequencies. Draw the frequency polygon for the following data. 2. The horizontal axis is denoted as the x-axis and the vertical axis is denoted as the y-axis. Before publishing your articles on this site, please read the following pages: 1. 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Therefore put a break in the X axis () to indicate that the vertical axis has been moved in for convenience. Mark the class interval along x-axis and frequencies along the y-axis. Ninety degrees counted off for the middle achiever students (25%) and 54 degrees for low achiever students (15%). 2. It is an estimateof theprobability distributionof acontinuous variable(quantitative variable) and was firstintroduced byKarl Pearson. Let us discuss how to draw a frequency polygon: Draw a horizontal line at the bottom of graph paper named ‘OX’ axis. Qes. Your email address will not be published. Ogives or Cumulative frequency graph… In this process to adjust the frequencies we take a series of ‘moving’ or ‘running’ averages. It’s storytelling with a purpose. We can quickly identify red from blue, square from circle. Good graphical representation _____ data-ink and erases as much non-data-ink as possible. Algebraic principles are applied to all types of graphical representation of data. 7.1) and distances left to the origin have negative value. In graphs, it is represented using two lines called coordinate axes. The excessive and unnecessary use of graphical effects in graphs that are not necessary to comprehend the information but to distract viewer's attention is known as _____. Whether the scores are piled up at the lower or higher end of the distribution or are evenly and regularly distributed throughout the scale. Log in. Its very useful to all students whether they are school students or college sudents, Your email address will not be published. The cumulative frequencies in the Y axis and frequencies along the y-axis on natural scale to determine the adjusted smoothed!, organized in cells ( e.g or some kinds of quality structure and provides different info in! 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