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Sukanya Das, Lovely Professional University Unit-27: Measures of Central Tendency: Mean, Median, Mode

unit-27: Measures of central tendency: note

Mean, Median, Mode

CoNteNts
objectives
introduction
27.1 Measures of General tendencies

27.2 statistical Average
27.3 types of Averages
27.4 Calculation of Mean in Discrete series
27.5 Calculation of Mean in Continuous series
27.6 Merits of Arithmetic Average or Mean
27.7 Demerits of Arithmetic Average
27.8 Median

27.9 Method of Calculating Median
27.10 Mode
27.11 summary
27.12 Keywords
27.13 review Questions

27.14 further readings

objectives

After studying this unit students will be able to:
y summarize the complex series and series of digits.
y Analyze large groups through summarised pictures.
y easily compare large numbers.
y Guess the relation or ratio found between two or more series or groups.

introduction

During social investigation, whatever statistical data are accumulated, through them, any inference
cannot be drawn. Because of this, classification or tabulation of that data is essential. Even after that, to
make them more easy and understandable, help of diagrams and graphs is taken. But, how successful
will be the study of facts through diagrams and graphs, it depends on the view of the investigator,
which is a subjective factor. That is why, from the series of facts, we essentially need to find out one
such digit which may appropriately represent that series. through it, comparative study becomes

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