INTRODUCTION AND MEASURE OF CENTRAL TENDENCY

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## INTRODUCTION AND MEASURE OF CENTRAL TENDENCY

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**STATISTIC IS A BRANCH OF MATHEMATICS THAT WHICH DEALS WITH:**• COLLECTION OF DATA • ARRANGING THE DATA • REPRESENTING THE DATA • ANALYSING THE DATA FOR SOME FRUITFUL PURPOSE**DATA COLLECTED CAN BE ARRANGED IN THE FOLLOWING WAYS:**• ASCENDING OR DESCENDING ORDERS • UNIVARIATE FREQUENCY DISTRUBUTION TABLE • BIVARIATE FREQUENCY DISTRUBUTION TABLE**DATA CAN BE REPRESENTED BY:**• BAR DIAGRAMS, PIE CHARTS • HISTOGRAMS • FREQUENCY POLYGON • OGIVE CURVES**STATISTICAL DATA CAMN BE CLASSIFIED INTO**• UNGROUPED/ RAW DATA • UNGROUPED FREQUENCY DISTRIBUTION • GROUPED FREQUENCY DISTRIBUTION • CONTINUOUS CLASS INTERVAL • NON-CONTINUOUS CLASS INTERVAL**A PARTICULAR OBJECT/ASPECT UNDER INVESTIGATION IS CALLED A**VARIABLE/ATTRIBUTE THERE ARE TWO TYPES OF VARIABLES • DISCRETE • CONTINUOUS**ANALYSIS OF THE STATISTICAL DATA CAN BE DONE BY**• MEASURING THE CENTRAL TENDENCY • MEASURING THE SPREAD OR DISPERSION