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Sukanya Das, Lovely Professional University Unit-29: Correlational Analysis: Test of Significance and Co-variance
Unit-29: Correlational Analysis: Test of Significance notes
and co-variance
CoNteNts
objectives
introduction
29.1 Subject-Matter: What is Correlation?
29.2 Definitions of Correlation
29.3 Kinds of Correlation
29.4 Methods of Measurement of Correlation
29.5 scatter Diagram or Dotogram
29.6 Correlation Graph
29.7 Coefficient of Correlation
29.8 summary
29.9 Keywords
29.10 review Questions
29.11 further readings
objectives
After studying this unit students will be able:
y To define the mutual relationship between the various categories of facts.
y Understand the kinds of correlation and various methods of measurements of correlation.
introduction
An objective of presentation of facts is to give a description briefly and specifically of various facts
and to define their comparative state. These goals are also achieved through measurements of central
tendency. Mean, median and mode are used for accurate measurements of their central tendencies
and also give them a short form. But only by making short the gathered facts doesn’t help to ease
the analysis and result formation because by doing so we get absolute results which are not of much
use for us. To make them more useful it is necessary to define the mutual relationships between the
various categories of facts. The procedure of correlation fulfils the goal of this and before writing
anything more in this direction, let us first understand the meaning of correlation.
29.1 Subject-Matter: What is Correlation?
explaining the meaning of correlation, Prof. Katariya writes—We usually want to know what the
relation between two inter-related categories is. it is commonly seen that when there is an increase
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