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Multiplication: Whole Numbers: COOP-HSPT Arithmetic

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Equations with Several Variables: COOP-HSPT Algebra

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Advanced Equations: SAT Math II Algebra I

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Sets: GED Algebra

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qtc2-1

N.P.Bali; P.N.Gupta; Dr C.P.Gandhi Laxmi Publications PDF

2

Source and Collection of Data

2.1. INTRODUCTION

Data may be collected either from the primary source or the secondary source. By

Primary source, we mean a source which collects the data itself.

And a secondary source is one that makes available data collected by some other agency.

Thus, �primary sources are the first hand evidence left behind by the observers of the time of events.�

Examples of primary sources are:

Autobiographies, diaries, emails, letters, correspondences, eyewitnesses, opinion polls, transcripts, cartoons, postcards, posters, photographs, films etc.

�Secondary sources are materials that digest, analyse, evaluate and interpret information contained within the primary sources.�

Examples of secondary sources are:

Biographies, textbooks, encyclopaedias, dictionaries, handbooks, commentaries, art, music, research articles of any disciplines, etc.

2.2. WHICH SOURCE OF DATA IS BETTER?

Whenever possible, we should prefer to make use of primary source because of the following reasons:

(i) Primacy source contains data in greater details as compared to secondary source.

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Medium 9781576336274

Geometry: COOP-HSPT Arithmetic

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Quadratic Equations and Radicals: COOP-HSPT Algebra

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Circles - Regular Polygons: GRE Geometry

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Coordinate Geometry: PSAT Algebra

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Signed Numbers: Praxis I Algebra

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Square Roots and Powers: SAT Arithmetic

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Variation: GED Algebra

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Simultaneous Equations: PSAT Algebra

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Square Roots and Powers: SSAT-ISEE Arithmetic

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Word Problems: Fractions: COOP-HSPT Arithmetic

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